Our zippies are designed to fit true to size with added stretch.
That means:
• They follow standard sizing for length and overall fit
• Our bamboo fabric has natural stretch, allowing for extra wear over time
• The fit is snug (by design), but flexible and comfortable
Because of the stretch, many families find they can wear the same size longer than expected.
If you’re between sizes or prefer a looser fit, sizing up is always a safe choice.