Baby Blocks Applique Font comes in 1", 2", 3" and 4" heights based on the height and width of the block. The 4" set is actually 3.9" square blocks to fit all standard 4x4 hoops. The block outline is satin stitch, letters are fill stitch with Floss Stitch outlines; Floss stitch stitches out on all embroidery machines with standard embroidery thread. The block outlines on the 1" and 2" sets are thin and require close trimming of the applique fabric; See Above for Applique instructions.