We Match! Unisex-Baby I Love My Aunt (Ant) Long Sleeve T-Shirt These run SMALL. Approximate sizing 6 Month = 3-6 Month, 12 Month = 6-12 Month, and 18 Month = 12-18 Mont. If you are close to the end of one range, order up. 100% cotton, long sleeve t-shirt Watch the Aunt smile when she sees this shirt. As seen on TV, magazines, and on celebrites and their kids, We Match! Clothing is the original matching set clothing company for families. The only, the original, We Match! Don't see the color you are looking for? All We Match! sets are listed as single pieces and vice versa in more colors and styles than seen here.