Greeting Card Mailing Envelopes

Envelopes come in sizes (A2, A6, A7, 4-bar), closure types (peel-and-seal, gummed, clasp), materials (kraft, white, colored, recycled, windowed) and thicknesses (standard to heavy-stock). Choose size to match your card, closure for convenience or security, material for presentation or durability, and weight based on mailing requirements and postage

Use a slightly larger envelope or add a cardboard stiffener for protection, select heavier stock or padded envelopes for fragile items, and opt for secure closures (peel-and-seal or reinforced gummed). Also check dimensions and weight to determine proper postage and handling

Common sizes include A2 (4.375 × 5.75 in), A6 (4.75 × 6.5 in), A7 (5.25 × 7.25 in) and 4-bar (3.625 × 4.875 in). Measure the card folded and allow a small margin (about 1/8–1/4 inch) on each side for easy insertion and removal

Finishes and colors do not directly change postage, but added weight from heavier cardstocks, inserts, or packaging can increase postage. Metallic inks, foil, or textured surfaces may require extra care (like rigid mailers) to avoid damage during automated sorting

Many recycled and eco-friendly envelopes match the durability of standard papers, though weights and finish options can vary; look for GSM or lb ratings and any tear- or moisture-resistance specs to compare. Recycled content does not inherently reduce strength if the product lists equivalent weight and thickness

Bulk packs reduce unit cost and are useful if you mail frequently; typical buyers choose quantities from 25 to several hundred depending on volume. For occasional mailers, smaller packs avoid storage issues and product aging; match pack size to expected use over months to minimize waste

Verify envelope interior dimensions, closure type, paper weight (GSM or lb), color/finish, and whether the pack includes windows or liners. Also review any size charts or images showing a card inside the envelope to ensure a proper fit