"The quality of these cards was amazing - nice, heavy paper. We used one of the photo filters on the single picture we used and the outcome was absolutely lovely. We also got the special rectangular envelopes to save on postage and they worked a treat (only need a single stamp to mail them). When you select the rectangular envelopes, I believe they change the size of the card to 5x5 (so it can fit in a 5x7 envelope) instead of 5.25x5.25. Either way, they were lovely!! We are looking forward to many more tinyprints purchases (this is our 2nd)!"