Quick answer

Measure your head circumference just above your ears and eyebrows. For a standard dad hat, look for an adjustable strap that fits 21.5 to 24 inches. If you have a larger head, choose an unstructured dad hat with a longer brim and a deeper crown.

How to measure your head for a dad hat

Use a flexible tape measure or a piece of string. Wrap it around your head about one inch above your eyebrows and ears. Note the measurement where the ends meet. If you use string, lay it flat against a ruler. Write down the number in inches or centimeters.

Most dad hats have an adjustable strap, so the fit range matters more than a precise number. A typical adjustable dad hat fits head circumferences from 21.5 to 24 inches. If your measurement falls outside that range, you may need to look for hats labeled as oversized or deep crown.

Structured vs unstructured dad hats: what's the difference?

Structured dad hats have a stiff front panel that holds its shape. They give a more polished look but can feel snug on larger heads because the crown is fixed. Unstructured dad hats have a soft, flexible front panel that conforms to your head. They often sit lower and are more forgiving for round or larger head shapes.

If you have a smaller head, a structured hat can add shape without looking too big. For medium to large heads, unstructured hats usually provide a more comfortable, natural fit. The trade-off is that unstructured hats can look floppy if the crown is too deep for your head.

What to look for in a dad hat for a big head

Look for hats with a deeper crown and a longer brim. A deeper crown gives more vertical space, so the hat doesn't sit too high or look perched. A longer brim helps balance the proportions of a larger face. Avoid hats with a very short brim or a shallow crown, as they can feel tight or look undersized.

Check the strap type. A fabric strap with a metal buckle or a snapback closure offers more adjustability than a simple elastic strap. Some brands also offer extended sizing or one-size-fits-most with a larger range. Always read the product description for the fit range before buying.

Decision rules for choosing your dad hat

  • Measure first: Use a tape measure around your head just above the ears and eyebrows. Write down the circumference in inches. Know your number before you shop.
  • Match structure to head shape: Choose structured for small to medium heads that want a crisp shape. Choose unstructured for medium to large heads that need a flexible fit. Unstructured is more forgiving for larger heads.
  • Check the strap range: Look for a strap that covers your measurement. Fabric buckle straps offer more adjustability than elastic. Adjustability is key for a secure fit.

Product facts to consider

  • The Woogas | Jimmy Knorp | Blitzball Battle 5 Jersey: Made of breathable, moisture-wicking fabric, it includes all the key details of the original jerseys, such as official logos, player names, and numbers. Available in various sizes. While this is a jersey, not a hat, the moisture-wicking fabric and size variety show Jomboy Media's attention to fit and comfort across their apparel line.
  • Ben Rice - Star Player: Designed by Slash Line, printed in the USA with fade-resistant inks on a garment-dyed heavyweight t-shirt. This tee uses heavyweight fabric that holds its shape well, similar to how a structured dad hat maintains its form. The fade-resistant printing also indicates durable quality.

Who should wear what

Best for

  • People with head circumferences 21.5 to 24 inches looking for a classic dad hat fit
  • Those who prefer an unstructured, low-profile cap that conforms to the head

Not for

  • People with head circumferences over 24 inches who need extended sizing or a deep crown hat