These Blue Stone Lace Tights Zigzag are model 3416-4.  They have a small zigzag pattern horizontally across the entire tights.  This is a classic style.  These look like they'll be pretty durable.  Blue Stone is known for having a good fit.  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.