mud season $20.00 Inside Message blank Packages of Heartstrings® cards are shrink-wrapped and sold in sets of 10 cards with envelopes. The actual card size is 4 1/4" x 5 1/2". mud season quantity Add to cart Categories: Cycling, Skiing, Sports. Related Products Each of Us Makes a Ripple $20.00 You Have Learned to Make Friends $20.00 Run Home $20.00 Over the Mountains $20.00