2.25"×3.5" & 3.23"×4.53"

Easy to use: wipe just a little water to wet the glue on the envelope, then fold the sealant and hold it for a minute, it can be adhered. Water glue design can effectively secure your small parts or seed from being damp or losing Liable quality: each self-adhesive envelope is made of superior kraft paper, good texture, sturdy and durable, not easy to fade; the seal is tight, so the product inside can be well protected DIY the pattern to mark it: these 200 pieces kraft packets envelopes allow you to past the labels for distinguishing the items inside; even you can print, draw or write down something to DIY patterns on the envelopes