Clover Metal Ring Thimble This metal thimble can be used for thick materials and can be adjusted for any finger size. Clover Adjustable Thimble with Metal Plate Designed for long-running stitches using a long needle or sashiko. One size fits all.Clover Leather Adjustable Thimble The leather stretches and fits snug on the finger and will not damage the thread. Just slip the thimble between the second and third joint of the middle finger and place the top of the needle in the indentation for a firm hold. 2 per pack. Olympus Leather Adjustable Thimble Designed for long-running stitches using a long needle or sashiko. One size fits all.