what is a standard thank you note size
A2 Blank Cards, Flat & Folded - 4 1/4 x 5 1/2. (A2) 4 1/4 x 5 1/2 blank cards are commonly used as reply cards, post cards, thank yous, note cards, and more. Cards come pre-cut and have matching A2 envelopes available for your creative convenience.