Royal Mail and Courier Guidelines for Paper Mailing Bags
Royal Mail and courier rules for paper mailing bags: sizes, weights, and rates.
Royal Mail guidelines
Quick answer
Paper bags with thin contents (folded clothing) can qualify for large letter rates if total thickness stays under 25mm and dimensions under 353x250mm. This saves over £2 per item vs small parcel. Measure packed bags to confirm. Heavier items like jeans or multiple garments often exceed the 750g weight limit. Couriers typically charge by weight with dimensional weight calculations.
Courier guidelines
Most UK couriers (DPD, Evri, DHL) classify paper bags by weight and dimensions. Paper bags are lighter than boxes, often resulting in cheaper courier rates. Some couriers offer specific "mailer" rates for flat packages.
Costs: shipping savings or cost comparison.
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Postage-efficient paper bags
Paper bags sized for Royal Mail rates from ProcuraPack.
Browse paper mailing bagsFrequently asked questions
If total dimensions are under 353x250x25mm and weight under 750g, yes.
353x250x25mm, up to 750g.
Usually yes, due to lower weight.
Measure samples to know typical dimensions. Spot-check regularly.
Some offer flat-package rates. Check with your carrier.
Part of our guide
Product Guide: Paper Mailing Bags
Expert guides on paper mailing bags for sustainable, professional shipping.
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