Sew Very Smooth notions ideal seam gauge Sew Very Smooth notions to make your sewing experience precise and smooth Ideal seam gauge- never guess again Simple drop your needle through one of the pre-drilled hole of your desired seam width then square ideal seam guide along the edge of the gauge Seam Measurements include: 1/8, scant 1/4, 1/4, 3/8, 1/2, 5/8, 3/4, 1, 1 1/4, and 1 1/2