#1 Coin envelopes are 2 1/4 x 3 1/2; just big enough to hold stamps, jewelry, keys and other small parts; in durable 24lb kraft; 500 per box Our small manila envelope is built sturdy from 24 lb kraft paper; thick paper provides privacy and durability for the items you tuck away A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail Use these versatile small envelopes 1,000 ways; for jewelry envelopes; garden seed envelopes, gift card envelopes; stamps, antique coins, keys & more Stock up for the office, home, home office and homeschool; these small yellow envelopes come in handy everywhere; in boxes of 500