These Blue Stone Lace Tights Diamond are model 3416-6.  They have a large diamond (looks like argyle) pattern on them all over the tights.  This material looks like it will be quite durable.  This pattern is a classic.  These sizes are age sizes not tights sizes like most design and school tights are.  Size 2-3 is good for the average 3 year old.  Size 4-5 is ok for a 4-5 year old.  Size 9-10 is ok for a 9 year old in general. 92% Nylon, 8% Spandex.