Standard Cap Size Chart:

Extra Small:

Circumference 20 - 20.5”
Front to Nape 12 - 12.5”
Ear to Ear Across Forehead 10 - 10.5”
Ear to Ear Over Top 10.5 - 11"
Temple to Temple Around Back 12.5 - 13"
Nape of Neck 4 - 4.5”

Small Cap:  

Circumference 21 - 21.5”
Front to Nape 13 – 13.5”
Ear to Ear Across Forehead 11”
Ear to Ear Over Top 11.5 – 11.75"
Temple to Temple Around Back 13 – 13.5"
Nape of Neck 4.5 - 5”

Medium Cap:  

Circumference 22 - 22.5”
Front to Nape 14 – 14.5”
Ear to Ear Across Forehead 12 – 12.5”
Ear to Ear Over Top 12.5 – 13"
Temple to Temple Around Back 14.5 – 15"
Nape of Neck 5 - 5.5”

Large Cap:

Circumference 23 - 23.5”
Front to Nape 15 – 15.5”
Ear to Ear Across Forehead 11.5 – 12”
Ear to Ear Over Top 13 – 13.5"
Temple to Temple Around Back 15 – 15.5"
Nape of Neck 5.5 - 6”