Simplicity Side Winder The Portable Bobbin Winder Purple Compact size portable bobbin winder fits anywhere and is easy to carry on the go. It comes with a high-quality AC power cord and runs efficiently on two AA batteries. Specially designed to accommodate standard size bobbins with round center holes, this bobbin winder is ideal to use on all your sewing projects. With just one button, your bobbins fill up easily without un-threading and re-threading. Quickly and easily fill bobbins without having to re-thread your machine. Dimensions: 7.5 x 6 inches. #88179PRPL