Understanding GSM, Bubble Height, and Layer Thickness in Bubble Mailers
GSM, bubble height, and layer thickness: the specs that define bubble mailer performance.
GSM explained
Quick answer
Standard bubble mailers use 50-70gsm outer film with 10mm bubble height. The outer film GSM determines tear resistance. Bubble height determines cushioning depth (10mm standard, 25mm for fragile items). Film thickness determines puncture resistance. For most e-commerce items, standard specifications are adequate. Upgrade to thicker film and taller bubbles only for genuinely fragile products.
Bubble height
Jewellery, phone cases, cosmetics, accessories.
Glass, ceramics, sensitive electronics.
Small bubbles provide more even, consistent coverage for lighter items.
Layer thickness
Standard bubble mailers use single-layer bubble. Premium versions use double-layer for extra protection. The outer film typically ranges from 50-70gsm for kraft and 40-60 microns for poly. Thicker outer film resists tearing from contents and handling.
Testing: testing guide or cushioning science.
How to choose
Specification guide0 / 3 checked
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Bubble mailers in every spec from ProcuraPack.
Browse bubble mailersFrequently asked questions
50-70gsm outer film for most bubble mailers.
10mm is adequate for most products.
For glass, ceramics, and sensitive electronics.
Yes, significantly more cushioning for fragile items.
Yes, heavier film adds weight to every mailer.
Part of our guide
Product Guide: Bubble Mailers
Expert guides on bubble mailers and cushioned shipping envelopes for safe, efficient deliveries.
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