ThreadNanny distributes high quality threads for many types of sewing projects like embroidery, needlepoint, and quilting along with sewing accessories.

They are exclusive manufacturers and distributors of some of the finest quality hand and machine embroidery accessories available on the market. All of their products are manufactured under their own brand name and with strict quality control.

Since 1999, their buyers have traveled the globe in search of the finest materials for the threads and accessories they sell today. Along with being the exclusive distributors of the ThreadNanny brand, we also provide the best customer service and support for our products.

What Size Bobbins Will Work In My Home Embroidery Machine?

There are 3 different sizes of machine embroidery bobbins that we sell, style L, M, and A (also know as Class 15). These do not stand for large and medium.

The Class 15 (A Style) Bobbin:

The Class 15 is about the size of an American nickel. Its diameter measures approximately 20.3 mm and has a width of approximately 11.7 mm. This bobbin has two flat sides and is available in both plastic and metal.

This type of bobbin is used by most sewing machines. If you machine makes regular sewing and also you can do computerized embroidery is very probable that your machine use this type of bobbin. We recommend to check your sewing machine manual. This bobbin has the same diameter like size L but a little taller (0.450”)

The L Style Bobbin:

This is the most common embroidery bobbin for commercial and home base embroidery machine. Machines like brother PR-600, Tajima, Melco, Barudan, SWF, Ricoma and Toyota are some of the machines that use Bobbins size L. 

The L Style is about the size of an American nickel. Its diameter measures approximately 20.3 mm and has a width of approximately 8.9 mm. This bobbin has two flat sides and is available in aluminum, plastic, and as a Magna-glide core.

It’s worth noting that the L Style bobbins are the same diameter as the Class 15 bobbins. As such, you can use L Style bobbins in a sewing machine that uses Class 15 bobbins. However, a Class 15 bobbin is too wide to fit in a machine that uses L Style bobbins.

The M Style Bobbin:

This is the most rare embroidery Prewound bobbin. Normally this type of bobbin is used by big industrial embroidery machines (4 heads to 24 heads). The difference between size L and size M is that size M is double size of size L. 

The M Style is about the size of an American quarter. Its diameter measures approximately 24.9 mm and has a width of approximately 10.7 mm. This bobbin has two flat sides and is available in metal, and as a Magna-glide core.