Speedhook Knot Tying Playing Cards 2.5in x 3.5in. 5in x 3.5in. Each playing card shows you how to tie a different knot with picture and uses of each knot. Learn to tie knots while playing your favorite card game. Specifications for Speedhook Knot Tying Playing Cards: Manufacturer: Speedhook Age Group: Adults Dimensions: 2.5 x 3.5 in Package Contents: Speedhook Knot Tying Playing Cards Speedhook KTPC: Knot Tying Playing Cards 2.5in x 3.5in