Here's another set of unidentical twin insulators. Pictured are 2 CD 102 Brookfield [090] ponies. They are both light aqua.

The skinny fellow on the left is 3-5/8" tall, 2-1/8" in diameter, has a whopping 1-1/8" of dome glass, and the skirt is 1/4" thick. The big boy on the right is 3-1/2" tall, 2-3/8" in diameter, has only 11/16" of dome glass, and the skirt is a hefty 7/16" thick. Skinny has a backwards 2 on the dome while the fat boy has what looks sort of like a backwards 7 on top.