Cumberland Strip Seal Pocket Envelope, 100gsm C3 (458 x 324mm), White, Box of 250

You need to send a batch of letters, contracts, or school reports and you want them to arrive looking clean, professional, and — crucially — intact. No creased corners. No half-opened seals. No "sorry, the post must have damaged it."

Cumberland's white C3 pocket envelope is the straightforward answer. 100gsm paper holds its shape through a rough postal run. The strip-seal closure stays shut until the recipient wants it open. Pocket opening on the short side means you slide documents in without wrestling them into place.

Box of 250 keeps your filing and mail room stocked for months. White gives you a clean canvas if you're adding a printed logo or school emblem. On the shelf now

• 100gsm paper weight — durable for documents, contracts, and reports
• C3 size 458 x 324mm accommodates A3 folded or A4 with margin
• Strip-seal closure keeps contents secure through postal transit
• Pocket opening on the short side for quick, jam-free loading
• Box of 250 stocks an office or school mail room for months