If you've ever shipped an order in a courier bag that was too big, you already know the problem — the product slides around inside, the bag looks half-empty and unprofessional by the time it reaches your customer, and you've paid for material you didn't need. Go too small, and you risk a bag that's stretched at the seams, a product that's visibly bulging through the packaging, or worse, a tear in transit.
Getting your courier bag size right isn't just a cosmetic decision. It affects your shipping costs, your damage and return rates, and — because the courier bag is often the very first thing your customer touches — how professional your brand feels the moment an order arrives.
Here's a practical framework for getting it right every time.
Step 1: Measure Your Product, Not Your Packaging Instinct
Before you look at any size chart, measure the actual product (or products, if it's a multi-item order) at its largest folded or packed dimensions — length, width, and thickness. If you're shipping apparel, fold it the way you actually plan to fold it for dispatch, not flat on a table with room to spare.
A simple rule of thumb: your courier bag should have the product filling roughly 80–90% of its interior space when packed. Enough room to seal comfortably and add a thank-you card or insert if needed — but not so much that the bag looks empty or the product shifts around during transit.
Step 2: Match Your Product to the Right Size
Evenpack's Kraft Paper Waterproof Courier Bags are available in six sizes, covering nearly every product category a D2C or e-commerce brand ships:
7×8 inches — Small. Best for: jewellery, small accessories, cosmetics, phone cases, wallets, small stationery items.
9×11 inches — Small-Medium. Best for: cosmetic sets, mid-sized accessories, small multi-item orders, compact electronics accessories.
10×12 inches — Medium. Best for: folded t-shirts and single apparel items, small books, standard e-commerce orders.
11×14 inches — Medium-Large. Best for: apparel sets, mid-sized multi-item orders, small home goods.
13×16 inches — Large. Best for: multiple apparel items, jackets and outerwear, bulkier multi-product orders.
15×18 inches — Extra Large. Best for: bedding and home textile items, large multi-item orders, and bulky products that need extra room.
If your product doesn't comfortably fit any of the six standard sizes, a custom size is worth discussing with your packaging supplier rather than forcing it into an undersized — or unnecessarily oversized — bag.
Step 3: Consider the Format, Not Just the Size
Size is only half the decision. The right format matters just as much. Evenpack's courier bag range spans:
Kraft Paper Waterproof Courier Bags — the natural, eco-friendly option with waterproof protection, ideal for soft, flexible, non-fragile products like apparel, accessories, soft goods, and documents.
White Paper Courier Bags — the same practical format with a clean white exterior, giving your printed branding a brighter, more premium print surface.
Bubble Padded Courier Bags — add a layer of cushioning protection, ideal for cosmetics, small electronics accessories, and jewellery that needs a bit more care in transit.
E-commerce Rigid Mailers — the right call for flat items that must not bend, such as prints, certificates, photographs, or flat cards.
E-commerce Expandable Mailers — built for products with some depth, such as books, folded garments, or small boxed items, combining the low cost of an envelope format with more room than a flat bag.
If you're shipping a mix of product types, it's common (and smart) to stock two or three formats rather than trying to force every order into a single size and style.
Step 4: Don't Forget the Seal Allowance
Every courier bag needs enough extra length at the top to seal properly using the self-adhesive strip — typically an additional 2–3 inches beyond your product's height. This is already factored into standard size charts, but it's worth double-checking if you're custom-ordering a size for an unusual product shape.
Common Sizing Mistakes to Avoid
Sizing up "just in case." A bag that's noticeably larger than the product inside doesn't just look unprofessional in an unboxing video — it also means you're paying more per unit than you need to, across every single order.
Not accounting for packaging inserts. If you're adding a thank-you card, a discount voucher, or branded tissue paper, factor that extra volume into the size decision — don't discover at packing time that your insert doesn't fit.
Using one size for every product. It's tempting to standardise on a single bag size to simplify ordering and inventory — but if your product range spans small accessories to bulky apparel, one size will always be wrong for some portion of your orders. Stocking 2–3 sizes is almost always worth the added inventory complexity.
Ignoring product fragility. Size is not the same as protection. A perfectly sized standard courier bag still won't protect a fragile item the way a bubble padded bag or rigid mailer will — match the format to the product, not just the dimensions.
Frequently Asked Questions
What size courier bag do I need for a folded t-shirt? The 10×12 inch size comfortably fits most folded t-shirts and similar single apparel items, with the 11×14 inch size a good option if you're including additional items or packaging inserts.
What's the best courier bag for jewellery? The 7×8 inch size is Evenpack's smallest and best suited to jewellery — pair it with the Bubble Padded Courier Bag format for pieces with delicate clasps or stones that need extra cushioning.
Can I get a custom courier bag size for my product? Yes — if your product doesn't fit within standard size ranges, custom courier bag sizes are available. Share your product dimensions with the Evenpack team and we'll recommend (or produce) the right size for your specific needs.
Do bigger courier bags cost significantly more? Yes, generally — larger bags use more material and typically cost more per unit than smaller sizes. Right-sizing your bag isn't just about presentation; it's a direct, ongoing saving on your packaging spend.
Get the Right Size, Every Time
Whether you're shipping delicate jewellery or bulky apparel orders, Evenpack's courier bag range — available in six sizes from 7×8 to 15×18 inches, and in kraft paper, white paper, bubble padded, rigid mailer, and expandable mailer formats — covers what most Indian e-commerce and D2C brands need. Not sure which size or format fits your product? Get in touch with our team for a quick recommendation, or browse the full Courier Bags collection to see all available sizes.
