Wool stand for knitting and crocheting - for 3,5mm needle

Wool stand for knitting and crocheting - for 3,5mm needle

The holes are 3,7mm, made for 3,5mm needle.  

For bigger wool balls you can upscale the model in the slicer, as example: 200% in both horizontal axes will make the base and the diameter of the hole twice as big, perfect for a long 7mm needle and bigger wool ball.