These DL-size envelopes by Clairefontaine are made to accommodate A4-size paper folded into thirds, and letter-size paper folded into thirds fits as well. The paper is 90 g, and the flap closure has a self-adhesive. The envelopes are PEFC-certified, indicating that the paper comes from certified sustainably-managed forests.
This is a pack of 25 envelopes.
Dimensions: 4.3 x 8.7 inches (11.0 x 22.0 cm).