Wippette Girls' Sunflower Rain Jacket and Boot Set 100% Other Fibers Imported Hand Wash The Rain Jacket and Rain boot sizes are as follows: 2T - Boot Size: 8 ; 4 - Boot Size: 11 ; 6X - Boot Size: 1; 5/6 - Boot Size: 13; 3T - Boot Size: 9 ; 4T - Boot size: 10.