I have a lot of 16 vintage wood thread spools.  Most of the thread is tan, yellow, orange, gold with 1 spool being empty.  The spools range in size from the largest being about 1 1/4" in height x 1" across the top to the smallest being about 1 1/8" H x 7/8" across the top.  The thread is old therefore more than likely not viable for use.  Some of the labels have been torn off of the spools, I have shown both sides of the spools.  Some of the names I see are Coats & Clark, Star and Betsy Ross.