Product Guide

Paper Mailing Bags Explained: Strength, Weight, and Durability

Strength, weight, and durability: the key specifications for paper mailing bags.

3 min readUpdated April 2025

Key specifications

GSM (grams per square metre): determines paper weight and strength
Paper type: virgin kraft (strongest) or recycled (most sustainable)
Coating: water-based coatings add moisture and scuff resistance
Seal type: peel-and-seal for convenience, gummed for economy

Quick answer

Choose 70-80gsm for light clothing, 90-100gsm for standard items, and 110gsm+ for heavier goods. Virgin kraft is stronger than recycled at the same GSM. Water-based coatings add moisture resistance without affecting recyclability. Peel-and-seal is the standard closure. Balance paper weight against postage: heavier paper is stronger but adds shipping weight.

GSM explained

Adequate for items that do not stress the paper.

Good balance of strength, weight, and cost.

Maximum tear and puncture resistance.

Over-specifying wastes money and adds postage weight.

Construction features

Quality paper bags have heat-sealed side seams (stronger than glued), reinforced base gussets for flat-bottomed items, and peel-and-seal closures. Some bags include expandable gussets for thicker items.

From ProcuraPack

Paper bags in every specification

Full GSM range from ProcuraPack.

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Frequently asked questions

70-80gsm for light items. 90-100gsm standard. 110gsm+ for heavy goods.

Virgin kraft, due to longer fibres.

Yes, heavier paper adds weight to every bag.

Water-based coatings for moisture resistance that maintain recyclability.

Peel-and-seal for convenience and tamper evidence.

Part of our guide

Product Guide: Paper Mailing Bags

Expert guides on paper mailing bags for sustainable, professional shipping.

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