Choose Pick Up option to get yours at Peacock's Nest, Space 41 at Pennsic. We have them in both standard pin backs and magnet backs, which make for great needle keepers for embroidery types, or for people who don't want to put holes in their stuff. 3cm.
If you're looking at something that looks black but ought to be blue, rest assured it's just the lighting in the photo. They will be blue in person. If you buy it early and find it to not be sufficiently blue, we will cheerfully refund you.