Most cheap bulk orders never need a bubble mailer, a plain windowed envelope holds far more than people expect (see the full technique in the cheapest way to ship bulk). A bubble mailer earns its cost once an order crosses roughly $20 to $50 in value, requires tracking, or is heavy or bulky enough that an envelope alone risks damage in transit.
Poly vs paper
Poly bubble mailers are the standard for cards: tear-resistant, water-resistant, and they hold up better than paper mailers to rough handling in a sorting facility. Paper mailers are cheaper and more eco-friendly, but they're more prone to tearing at the seams under weight, a real risk for anything with toploaders inside.
Sizing it correctly
- Size to the stack, not the order value. A single toploadered card and a five-card stack both fit the same small mailer size (commonly 4x8 or 6x9)
- Oversized mailers let cards shift around inside, the opposite of what a mailer is supposed to prevent. Snug is better than roomy
- Toploaders on both sides of a stacked group of cards inside the mailer add structure without much added weight, a common pattern for shipping several cards in one bubble mailer
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Typical size for single/small orders
Fits a toploadered card or small stack cleanly.
in4x8
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Cost per mailer, bought in bulk
Poly mailers, typical bulk pack pricing.
¢15–30
Shop bubble mailers on Amazon → (paid link) When an envelope is enough instead →