Boys summer sizing suggestions: Prim & Proper Polos tend to run true to small- we recommend buying up a size. Swim trunks run true to large. We suggest ordering child's true age or down a size. Trunks do have drawstrings to help adjust waist size this year. We can't wait to see your little gents sport their preppy pastels! ☀️🌴 #preppyinpastels #littlegent #childrenswear #shopnow #linkinprofile #primandproperpolo #carillonbeach #beaufortbonnet