Size Charts
Size Charts Made Easier
for Growing Kids
Sizing children's products online can feel tricky — especially when kids grow fast. BANZ® products are designed with adjustability, comfort, and longer wear in mind so families can shop with confidence.
Many BANZ® styles are adjustable, our swimwear is intentionally cut loose for comfort, and our products are built with hand-me-down quality to help each size last as long as possible.
Many BANZ® sunglasses and earmuffs adjust as your child grows.
Designed to fit loose for movement, comfort, and full coverage.
Most sizes are designed with at least two seasons of wear in mind.
Durable materials help BANZ® products go from one child to the next.
How to Choose the Best BANZ® Size
Children grow at different speeds, so age ranges are a helpful starting point — not a perfect rule. When choosing a size, consider your child's measurements, comfort, and how long you want the item to last.
If your child is between sizes
We usually recommend sizing up, especially for swimwear, hats, and seasonal items.
If buying for a younger baby
Look for adjustable styles that can grow with your child instead of fitting for only a short window.
If shopping for swimwear
BANZ® swimwear is meant to fit loose — not tight like fashion swimwear. When in doubt, size up.
Quick Fit Guide
Not sure which category to start with? Here's a quick reference for each product type.
Sunglasses
Choose by age range and face fit. Adjustable straps keep glasses secure as children grow.
Earmuffs
Choose Baby or Kids based on age and head size. The headband should feel snug but not tight.
Sun Hats
Measure around the head where the hat will sit. If between sizes, size up for longer wear.
Swimwear
Use height and weight when available. Our swimwear is intentionally loose for comfort and movement.
BANZ® Sunglasses Size Charts
BANZ® sunglasses are designed for active kids, with wrap-around protection and adjustable fit options depending on style. Click any chart to enlarge.
Adventure BANZ® Size Chart
Retro BANZ® Size Chart
JBANZ® Size Chart
BANZ® Earmuffs Size Charts
BANZ® hearing protection is designed to sit securely and comfortably. The fit should be snug enough to seal around the ears without pressing too hard. Click any chart to enlarge.
Baby Hearing Protection
Kids Hearing Protection
BANZ® Hat Size Charts
For hats, the best fit comes from measuring your child's head circumference. If your child is between sizes, choose the larger size for comfort and room to grow. Click any chart to enlarge.
BANZ® UV Swimwear Size Charts
BANZ® swimwear is designed to be loose-fitting for your child's comfort. If your child measures between two sizes, choose the larger size. Click any chart to enlarge.
UV Swimwear Size Chart
Additional Swimwear Fit Guide
🌊 Swimwear Fit Note
BANZ® swimwear is intentionally loose-fitting for your child's comfort and freedom of movement. If your child measures between two sizes, always choose the larger size. This allows for movement, comfort, and longer wear across seasons.
Still Not Sure Which Size?
We're happy to help. If you have questions about a specific item, fit, measurement, or age range, reach out before you order — we'll guide you to the right choice.