Lori Holt Trim It Ruler 10-1/2in x 10-1/2in. Great to use for squaring up your 10 inch finished blocks!

Sizes: (1-1/2×6-1/2), (2-1/2×4-1/2), (3-1/2×6-1/2), (4-1/2×8-1/2), (5-1/2×10-1/2). By Lori Holt of Bee In My Bonnet.