Sold in pairs (one size for the index finger and one larger for the thumb): Large (teal) is 2.8cm in diameter, 3.3cm high; X-Large (Violet) is 3.0cm in diameter, 3.5cm high. Bohin needle pullers feature extra flexible silicone that adapts to any finger shape while allowing it to breathe like a second skin. Both a protection and an anti-slip tool, the needle puller grips your needle, allowing you to move the needle in and out of the fabric without it slipping and pricking you.