CleverDelights 3 inch plastic spools. 40 pack. Approximate dimensions: Height: 3" - Spool end diameter (flange) 2.75" - Hole diameter: 0.75" - Spool end thickness: 1/16". Color: White. For years, crafters, DIY jewelry makers, sewing and embroidery enthusiasts and many others have all used these sturdy empty plastic bobbin reels to organize and store their ribbon, thread, cord, rope, wire, string, lace, jewelry chain and other items. Great for home, industrial, arts and crafts, or other general storage uses. Plastic spool sizes from 1.5 to 5.5 inch available in our store.