My Little Pony Girls Rainbow Dash Halloween Long Sleeve Tee 100% cotton My Little Pony girls long sleeve tee features Rainbow Dash with Halloween candy and glitter accents crew neck, long sleeves, solid color back 100% cotton. Officially licensed Young girls sizing. Small (6/6X): 12.5" across chest, 18" sleeves, 19.5" length. Medium (7/8): 13.5" across chest, 19" sleeves, 21" length. Large (10): 14" across chest, 22" sleevs, 22" length. X-Large (12): 15" across chest, 24" sleeves, 23" length.