Cutex Brand 10 Small Bobbins for Singer 29-1, 29-4, 29k Class Sewing Machines #8604 Pack of 10 Small Metal Bobbins for Singer 29K Class Sewing Machines Bobbin #8604 The measurement on these small bobbins are 5/8" in diameter and about 7/32" deep These High-Quality bobbins will fit Singer 29K small bobbin machines including : 29-1, 29-4, 29K71, 29K73, 29K171, 29U171A, 29U173A We stock many types of bobbins & bobbin cases for industrial & domestic sewing machines