The Prewound Bobbin Style Guide takes the guesswork out of identifying the five most popular bobbin styles--"A", "G", "L", "M" and "U". There are precise circles showing each bobbin's diameter and boxes showing its height. If your bobbin matches these a circle and box with only the lines visible you know its style.  If not, use calipers and the Prewound Bobbin Style Dimensions to identify the style.

Important: You must download the Prewound Bobbin Style Guide and print it to do size matching. The image on your screen is not precise enough to be useful.

Very Important: When you finish printing click "The Thread Exchange" tab to continue shopping.

Used with home and small commercial machines for garments and embroidery

Used with small and mid-sized commercial sewing machines for garments, fabrics, and leather.  

Used with home sewing, embroidery, and small commercial machines for embroidery and garments.

Used with mid-sized and large commercial machines for heavy fabric, canvas, upholstery, and leather.

Used with heavy duty commercial machines for sewing thick fabric, upholstery, and leather. 

We have over 100 bobbin selections that sell for $20 a gross (144). Some boxes are battered, but the bobbins are in great shape

Style D