3 1 8 x 2 4 10 July 8, 2019 16 32 64 128 3 4 x 8 1 2 2x 10 4 1 2 x 10 3 8 envelopes 4 1 2 x 10 3 8 envelope size 1 2 x 4 5 3 10 8 3 1/4 x 8 1/2 3 1/2 x 8 3/4 1/4 + 3/8
