No water, sponge or type required. Just Simply 'flipping' up the bottom flap and folding down the top flap creates a self-sealing envelope.
Top window is 3 ¾ x 7/8"
location is 3/8 from left 2-5/16" from bottom
Bottom window is 3 ¾ x 15/16
Location is ¾ from left and 11/16 from bottom
