This Deller cap is handmade from mostly recycled wool garments by Shaun Deller. The size is: One-Size-Fits-Most because it is made from a knit merino wool that stretches like a knit beanie. It will fit from about 20"-25" in circumference. The style is my unique Alpine cap design in brown and tan merino wool knit fabric. It features a knit earflap that can be folded up or down to warm the ears. The interior is lined with a new, thin, merino jersey fabric for added warmth and a finished look. This is an ideal cap for cold, winter rides, skiing, snowshoeing or choppin' fire wood. All Deller caps are designed to be thin enough to fit under a bike helmet. The bill is reinforced with a durable die-cut plastic foam insert that is flexible and shapeable.