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|Hat Size||6-Â¾ to 6-7/8||7 to 7-1/8||7-Â¼ to 7-3/8||7-Â½ to 7-Â¾|
|US (inches)||21-1/8 to 21-Â½||21-7/8 to 22-Â¼||22-5/8 to 23||23-Â½ to 24|
|Metric (cm)||54 to 55||56 to 57||58 to 59||60 to 62|
Promate Ardent 3mm Beanie/DS338 Don't bother anymore about entangling of hair with silicone strap of mask while taking off your mask Keep your warm so that you can enjoy your snorkling trip Colorful to help easily identify for your safety