Ultra Fit Jr Brannock Device (children's) - blue body - FBA Lexan Made in USA Very solid, high-quality, durable. Made of Lexan, very strong plastic (for lower price than Jr Brannock device). This is the fitting device used in most shoe stores. US sizes. Measures from infant size (US) 0 to childs (US) size 5. Will measure most children up to the age of 10. Same item as standard Ultra Fit Jr with yellow body, only with blue Lexan body instead.