Embroidery bobbins in many different types, colors and styles. Selection the correct bobbin that best fits your embroidery needs. Magnetic Magna Glide Bobbins, Sideless, Plastic Sided, Paper Sided or Fire Resistant. Most every bobbin comes in one of two sizes: Style L which is smaller and Style M which is larger. Color options may be a bit limited with white or black but choosing which color many help the overall outcome of the embroidery job by running smoother or more efficiently. Always remember bobbin tension is a big key factor in which everyone you are using.