50+ units · Sample 5–7 business days · Production 10–15 business days after sample approval
Custom Mailer Boxes
Corrugated roll-end tuck-front mailers engineered for the doorstep — branded inside and out, ship flat, and assemble in seconds.
Quick answer
Custom mailer boxes are corrugated shipping boxes built for direct-to-consumer ecommerce. Die-cut from E-flute or B-flute board, printed flexo, digital, or offset CMYK on both sides, they ship flat and assemble in seconds — engineered to protect the product in transit and present the brand at the doorstep. They are used by DTC, subscription, apparel, beauty, and food brands where shipping volume, sustainability, and unit cost matter more than absolute premium weight. MOQ starts at 50 units. Lead time is 10–15 business days after sample approval. Sample fees are credited against your first production order. DDP shipping to 50+ countries including USA, Canada, Germany, France, UK, Italy, Spain, Australia, Japan, South Korea, Singapore, Malaysia — no surprise customs fees.
MOQ
50 units
Sample
5–7 business days
Lead time
10–15 business days
Category
Boxes
Format
Mailer Boxes
Why order direct from XC Paperbox
Foshan factory
18,000 m² since 2018
FSC A000511
Certified paper sourcing
ISO 9001:2015
Quality management
1M+ boxes / year
Volume capacity
DDP to 50+ countries
No surprise customs
24-hour quote
Reply within 1 business day
Overview
What it is, and when to use it.
Custom mailer boxes are corrugated shipping boxes built for direct-to-consumer ecommerce. Each box is die-cut from E-flute or B-flute corrugated board — 100% recyclable, FSC-certified, and engineered to survive rough courier handling — then printed flexo, digital, or offset CMYK on the outside and inside. The standard construction is roll-end tuck-front (RETF): the box ships flat in a sleeve, and the side flaps fold in and tuck closed in under five seconds with no glue or tape. That makes mailers the workhorse format for DTC brands, subscription services, and 3PL fulfillment centers that ship premium unboxing experiences at scale. What makes a mailer different from a rigid or magnetic box is the channel. Rigid and magnetic boxes are built for the counter, the gift, or the unboxing moment — the box is part of the product. A mailer is built for the doorstep: it protects the product in transit, presents the brand at delivery, and gets recycled (or reused) within minutes. The corrugated structure is lighter, cheaper, and faster to produce than rigid — and the unit-cost curve is dramatically lower. That makes mailers the right format when shipping volume, sustainability, and unit cost matter more than absolute premium weight. We manufacture custom mailer boxes in low MOQ runs starting at 50 units per SKU, with printed samples in 5–7 business days and production in 10–15 days. Every project runs on a dedicated production line in our FSC-certified facility in Foshan, China, with flexo, digital, and offset printing in-house. Common applications include DTC ecommerce launches, subscription boxes, apparel and beauty shipping, food and snack subscription, book and media shipping, and PR kits — any context where the box ships to a doorstep and the unboxing is part of the brand experience.
Best for
- DTC ecommerce
- Subscription boxes
- Apparel & fashion
- Beauty & wellness
- Food & snack subscription
- PR & influencer kits
Buyer's decision framework
When to choose custom mailer boxes — and when not to.
Mailer boxes are the right call when the box ships to a doorstep and gets recycled. They are the wrong call when the unboxing is part of the product, the box needs to live on a retail shelf, or absolute premium weight matters. Walk through these four questions before you commit.
- 1
Does the box ship to a doorstep — or sit on a counter?
If the box ships to a customer's door via courier or post, a corrugated mailer is engineered for that journey: puncture-resistant, lightweight, and recyclable. If the box sits on a boutique counter or under a fragrance counter, a rigid or magnetic box delivers the weight and feel the retail context demands.
- 2
What is your target unit cost?
Corrugated mailers sit at the low end of the box family — dramatically lower than rigid or magnetic boxes, modestly above folding cartons. If your retail price is under $40 and packaging is invisible in your margin stack, a mailer is the right call. If the box is part of the gift or the luxury positioning, the mailer will feel cheap — choose rigid or magnetic.
- 3
How important is shipping protection?
Mailers are engineered for courier handling — B-flute survives rough routes, E-flute balances print quality with protection. Rigid and magnetic boxes need an outer mailer for shipping anyway, doubling packaging cost. If shipping protection is the priority, a single engineered mailer is simpler and cheaper than a rigid-in-mailer combo.
- 4
Is sustainability a core brand claim?
Corrugated mailers are single-material recyclable board — the most sustainable premium packaging format. Rigid boxes, magnets, ribbons, and fabric inlays all complicate recycling. If your brand leads with sustainability, a kraft mailer with water-based inks and chain-of-custody documentation is the strongest on-pack claim you can make.
This page
Mailer box
DTC ecommerce, subscription, doorstep
- Cost
- $$
- Lead
- 10–15 days
- MOQ
- 50 units
Alternative
Folding carton
Retail shelf, food, supplements
- Cost
- $
- Lead
- 10–15 days
- MOQ
- 50 units
Alternative
Magnetic box
Flat-ship gifts, ecommerce, refills
- Cost
- $$$
- Lead
- 10–15 days
- MOQ
- 50 units
Applications
Common use cases
- DTC ecommerce launches
- Subscription boxes
- Apparel & fashion shipping
- Beauty & wellness shipping
- Food & snack subscription
- Book & media shipping
- PR & influencer kits
- Marketplace & marketplace-fulfilled
Materials
Board & paper options
- ●E-flute corrugated (1.0–1.6mm)The standard ecommerce mailer. Thin enough for crisp digital and offset printing, thick enough to protect small electronics, cosmetics, and apparel. Best for boxes under 2kg.
- ●B-flute corrugated (2.4–3.2mm)Heavier, stiffer, and more puncture-resistant than E-flute. Recommended for heavier shipments (2–8kg), fragile items, and rough-courier routes. The right choice when shipping protection is the priority.
- ●Recycled kraft corrugatedUnbleached brown kraft liner with 100% recycled flute. The eco-positioned default — natural look, FSC-certified, and recyclable in standard paper streams. Pairs with water-based inks.
- ●White-lined kraft (WLK)White printable face on brown kraft body. Gives cleaner CMYK print on the outside, keeps the recycled kraft structure inside. Best for brands that want a bright printed exterior with an eco interior.
- ●FSC-certified corrugatedRequired if your brand makes a sustainability claim on-pack or in marketing. We supply FSC-certified board and chain-of-custody documentation.
- ●Water-resistant coated boardFor shipments that may encounter humidity or condensation. A coated liner resists moisture without compromising recyclability. Used for chilled food and wet-route shipping.
Printing & finishes
How it gets dressed
Printing
- Flexo (1–3 colors)Recommended for 1,000+ unit runs with simple line art, logos, or single-color floods. Lowest per-unit cost at volume; water-based inks are eco-friendly.
- Digital (full color)Recommended for 50–500 unit runs and full-color photographic artwork. No plate setup, fast turnaround, ideal for market tests and small launches.
- Offset CMYKRecommended for 1,000+ units with photographic or brand-critical artwork on E-flute. Sharper than flexo, cheaper per unit than digital at volume.
- Pantone spot colorsRecommended for brand-critical color matches on white-lined kraft. Essential when CMYK cannot reproduce a corporate color.
- Two-sided printingRecommended for branded inside-the-box unboxing. The interior print carries thank-you cards, social handles, or promotional messaging visible at unboxing.
- Hot stamp foilRecommended for premium DTC brands that want foil accents on a kraft or laminated mailer. Adds a one-pass setup cost per foil color.
Finishes
- Matte lamination
- Gloss lamination
- Aqueous coating (eco-friendly)
- Spot UV on matte grounds
- Hot stamp foil (gold, silver, rose gold)
- Die-cut window (optional)
- Tear-strip for easy-open
- Custom insert cards & dividers
Sizes
Standard sizes — and fully custom
| Label | W | D | H | Unit |
|---|---|---|---|---|
| Small (apparel) | 150 | 100 | 50 | mm |
| Medium (cosmetics) | 250 | 200 | 80 | mm |
| Large (apparel) | 380 | 300 | 120 | mm |
| XL (hamper) | 450 | 350 | 150 | mm |
| Custom | — | — | — | mm |
Ordering & pricing
MOQ, lead time, and what drives the unit cost.
Every box is custom — there is no flat price list. Here is what you need to plan around, and what we will confirm in your tailored quote within 24 hours.
MOQ & sampling
Our standard MOQ for custom mailer boxes is 50 units per SKU. At 50 units we run digital printing, which avoids plate costs and lets you test a market or a seasonal launch without committing to volume. From 1,000 units, flexo printing becomes more economical per unit. From 5,000 units, dedicated tooling and bulk board pulls bring the unit cost down further. Sample fees are credited against your first production order.
Lead time
Sampling: digital sample in 5–7 business days, flexo/offset printed sample in 5–7 days. Production: 10–15 business days after sample approval, depending on quantity and printing method. Shipping: 10–25 days DDP to 50+ countries, depending on destination and whether air or sea freight is chosen. Total door-to-door timeline: 3–5 weeks for most orders. Rush production is available — we can compress to 8 business days for digital runs.
How to read pricing
Final pricing is confirmed in your tailored quote within 24 hours. We do not publish a flat price list because every mailer is custom — but we will always show the unit cost at 50, 100, 500, 1,000, and 5,000 units so you can see the volume curve before committing.
What affects the unit cost
Seven factors that move the quote.
Order quantity
Unit cost drops sharply from 50 to 1,000 units as setup and die-cut tooling amortize. Beyond 1,000, savings continue but flatten.
Box size
Larger mailers use more corrugated board and lower the number of units per press sheet. A 450×350×150mm hamper mailer costs roughly 3× a 150×100×50mm small apparel mailer.
Flute type
E-flute is the baseline for crisp printing and light shipments. B-flute adds 20–40% to board cost but is required for heavier shipments (2–8kg) or rough courier routes.
Printing method
Digital print is economical at 50–500 units. Flexo is cheapest from 1,000 units for 1–3 color line art. Offset CMYK is cheapest from 1,000 units for full-color artwork. Two-sided printing adds a pass.
Finishes
Aqueous coating is the eco baseline. Lamination, spot UV, and foil each add a pass. Tear-strips and die-cut windows add tooling and per-unit cost.
Inserts & dividers
Corrugated inserts, card dividers, and pulp trays are per-unit costs unique to multi-item shipments. Custom insert tooling is a one-time fee amortized across the run.
Shipping model
Flat-shipped mailers keep freight volume low. Pre-assembled or auto-erect (crash-lock) variants lower 3PL assembly labor but add production cost. Choose based on your 3PL's labor model.
Related case studies
See how brands have used custom mailer boxes.
Real project
How a snack subscription brand standardized on one mailer format.
- Client
- Direct-to-consumer snack subscription brand (US, monthly box)
- Challenge
- A DTC snack subscription was shipping assorted snacks in off-the-shelf mailers that arrived dented, with no brand presence at the doorstep. They needed a single mailer format that protected snacks, fit through a standard letterbox, photographed for social, and ran at a sustainable unit cost as they scaled.
- Format chosen
- E-flute corrugated RETF mailer, 250×180×60mm, digital-printed outside in full color with brand pattern, kraft interior, aqueous coating for scuff resistance, and a custom corrugated insert dividing the box into six snack compartments. Tear-strip for easy-open. Shipped flat to their 3PL.
- Result
- Damage-in-transit complaints dropped meaningfully after switching to the engineered E-flute format with a fitted insert. The brand scaled the same mailer format across three subscription tiers and a seasonal gift variant, locking in one dieline and one insert tooling fee across the range.
50 units.
Our standard MOQ for custom mailer boxes is 50 units per SKU. At 50 units we use digital printing, which avoids plate setup costs and lets you test a market or a seasonal launch without committing to volume. From 1,000 units, flexo printing becomes more economical per unit. From 5,000 units, dedicated tooling brings the unit cost down further.
Yes — two-sided printing is standard.
Two-sided printing on E-flute mailers is a standard option. Most DTC brands use the inside for branded tissue cues, thank-you cards, social handles, or promotional messaging that is visible the moment the customer opens the flap. Interior printing adds one pass and is quoted separately.
E-flute is thinner and prints crisper; B-flute is thicker and protects heavier items.
E-flute (1.0–1.6mm) is the standard ecommerce mailer — thin enough for crisp digital and offset printing, ideal for boxes under 2kg. B-flute (2.4–3.2mm) is thicker, stiffer, and more puncture-resistant — recommended for shipments between 2–8kg, fragile items, or rough-courier routes. We will recommend the flute based on your product weight and shipping route.
Yes — single-material corrugated, 100% recyclable.
Our mailers are 100% recyclable corrugated board with water-based inks. Avoid plastic windows, foam inserts, or poly bagging when sustainability is a goal. For brands making an on-pack sustainability claim, request FSC-certified board and we will include chain-of-custody documentation. Recycled kraft liner is the eco-positioned default.
Digital sample 5–7 days, production 10–15 days.
After design sign-off, a digital-print sample is produced in 5–7 business days. A flexo or offset printed sample follows in 5–7 days. Production runs 10–15 business days after sample approval, depending on quantity and printing method. Total door-to-door: 3–5 weeks for most orders. Rush production is available — we can compress to 8 business days for digital runs.
Flat — assemble in under 5 seconds.
Roll-end tuck-front (RETF) mailers ship flat in protective sleeves and assemble in under five seconds with no glue or tape — the side flaps fold in and the front tucks closed. This keeps freight volume and warehouse footprint low. If your 3PL prefers auto-erect cartons for higher-speed fulfillment, ask us about crash-lock bottom variants.
Yes — corrugated inserts, card dividers, and pulp trays.
Multi-item shipments need an insert to hold items in place during shipping. We make corrugated inserts (die-cut from the same E-flute or B-flute as the mailer), card dividers (for assortments and snack subscription), and molded pulp trays (for eco-positioned food and electronics). Insert tooling is a one-time fee amortized across the run. Send us the dimensions of each item and we will engineer the insert layout.
Mailers ship to the doorstep; rigid and magnetic are built for the counter.
Corrugated mailers are the right format when the box ships to a doorstep and gets recycled — unit cost is dramatically lower, lead time is shorter, and the structure is engineered for shipping protection. Rigid and magnetic boxes are built for the counter, the gift, or the unboxing moment where the box is part of the product. If your retail price is under $40 and the box is invisible in your margin, choose a mailer. If the unboxing is the product, choose rigid or magnetic.
Request a quote
Tell us about your project.
Send a few details and we'll come back within 24 hours with a tailored quote, lead time estimate, and material recommendations.
- · Free dieline and 3D mockup
- · Sample fees credited against first order
- · DDP shipping to 50+ countries
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Read before you order
Guides that pair with custom mailer boxes.
Packaging Guide · 12 min read
Ecommerce Packaging Best Practices
How to design packaging that survives shipping, reduces DIM weight, and creates memorable unboxing moments.
Read guidePackaging Guide · 10 min read
Corrugated Packaging Guide — Flute Selection & Design
Everything you need to know about corrugated board, flute types, and designing for shipping protection.
Read guidePackaging Guide · 14 min read
How to Choose the Right Paper Packaging Material
Compare art paper, kraft paper, coated paper, corrugated board, grey board, and recycled paper. Learn which material fits your brand, product, budget, and sustainability goals — with a practical decision framework and industry-specific recommendations.
Read guide
Ready to start?
Send us a sketch, reference, or sample. Quote back in 24 hours.
From 50 units · FSC-certified · DDP worldwide · Response in 24 hours
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