Convenient, go-anywhere size. Each tape measure has three 24 coiled rule tapes inside, each with its own non-slip toggle lock and spring action return. Uniquely shaped plastic body. Architect model has 12 graduations: 16,1, 1/2, 1/16, 1/8, 1/4, 11/2, 3, 3/4, 3/8, 3/16, and 3/32.
I have second thoughts about buying Triangular Scale Tape Three-Sided Measure Architect-CB01, but it turns out that I dind't make a mistake.