Enter your head circumference to see the measurement in centimeters and inches, then optionally record a tentative head-shape self-observation.
Hat sizing varies by brand and model. This profiler does not apply a universal US-size or S/M/L conversion chart.
Understanding head shape
Head shape describes overall proportion, especially the relationship between front-to-back length and side-to-side width. Two people with the same circumference can experience different fit because their head proportions may differ.
- Not sure
- Not being sure is valid; circumference can still be useful without selecting a head-shape category.
- Round oval
- A more nearly round overall proportion.
- Regular oval
- An intermediate oval proportion.
- Long oval
- A more elongated front-to-back proportion relative to width.
- Other / mixed
- A shape that does not fit one simple category.
Head shape here is a self-observation, not a diagnosis, and is not currently used to recommend specific hat models.