We brought in some marvelous (and some rather quirky) Stitch Stoppers from Fox & Pine Stitches.  

These are intended to keep your stitches from slipping off your needles and are made of a flexible silicone

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1.  White Sheep (fits needles from US 2 (2 3/4mm) to US 13 (9mm). 

2. Snowman (also fits US 2 to US 13)

3. Blue Llama (fits size US 3 (3 1/4mm) to US 13 needles)

4. Christmas Gnome (again fits needles from US 3 to US 13)