A queen size afghan measures 66 inches by 78 inches. When browsing through crochet sites, you will find no fixed size for a queen-sized Afghan or blanket. Before you start crocheting your blanket, measure your queen-sized bed. This crucial step will give you the actual length and width measurements to serve as your guide. You can compare your exact measurements with this list of the American Standard Mattress Sizes. Sizes Dimensions (in) Dimensions (cm) Afghan Measurements (in) Number of 6×6 inches squares Crib 27 X 52 inches 68.5 X 132 cm Twin (Single) 39 X 75 inches 96.5 X 190.5 cm Full (Double) 54 X 75 inches 134.5 X 190.5 cm 60 X 78 inches 130 (10X 13) Queen 60 X 80 inches 152.5 X 203.5 cm 66 X 84 inches 154 (11 X 14) King 76 X 80 inches 193 X 203.5 cm 80 X 84 inches 196 (14 X 14) You may also use this chart as a guide if you decide to crochet a smaller or bigger blanket than a queen-size blanket.