Thank you for your replies. This is the first time I have heard of lace bobbins and will do some looking around.
Width. In the Flickr pictures, the first picture, the triangular, green one, the top is about 1.5 cm. wide. Over all they match the thickness used for hair pins here in Japan so I think that is a possibility.
Color. They are actually not that bright compared with other glass I have seen that is very old.
They are a real curiosity. I bought them at an antiques auction that is for dealers. The case they came in was marked 'Silk Road" and 2 characters that I couldn't read. I don't put a lot of stock in the attribution but it may be right. It isn't unusual for ancient items to be sold at that auction.