TWR offers two bobbin winders for small paper quills (thin) and more substantial plastic or wooden bobbins (thick). If unsure which to purchase, Glimakra suggests choosing the 'Thin' option as larger bobbins can still be wound on a fine spindle. When winding larger bobbins on a fine spindle, place a three-inch cardboard quill between the spindle and the larger bobbin to fill in the negative space.