Measure around the forehead, just above the ears, and around the hair in the back to determine head size. If your measurement falls on a size cut off guideline, we recommend that you order the smaller size as there is a bit of stretch in the fleece material.
|SleepPhones® / RunPhones® Size||Hat Size (US)||Hat Size (UK)||Inches||cm||Estimate|
|Extra Small/Small||Up to 6 3/4||Up to 6 3/4||20 - 21 3/8||51 - 54||Petite women with short hair|
|Medium (one size fits most)||6 7/8 - 7 3/8||6 7/8 - 7 3/8||21 1/2 - 23 3/8||55 - 59||Nearly everyone|
|Extra Large/Large||7 1/2 and up||7 1/2 and up||23 1/2 - 25||60 - 63||Large and tall men with hair|