Everything worth knowing about Blue Supreme Beanie is below, starting with the part that changes what you buy. Hat sizing is a circumference in centimetres. Measure once and you never guess again. The groups below run from the decision that matters most to the ones you make afterwards.

What decides this is crown depth, brim width and circumference. Everything else is preference. Two from the first group show the range: Ksubi's SHIELD BEANIE BLACK at $120, and Halfdays's Merino Beanie at $65. The first is the considered buy; the second is the one to start with. Hat sizing is a circumference in centimetres. Measure once and you never guess again. A higher price mostly buys materials and finishing, and occasionally it buys nothing at all.

A hat commits the whole outfit. Keep the rest simple. From the second group, 12thtribe.com's Frost Cream Knit Beanie ($14) is the one that earns its place, because it works in more than one context without being restyled. The third group is smaller and deliberately narrower, hats, for the decisions you make after the main one. None of this needs the whole group. One piece from each is usually enough.

There are 20 pieces here from 15 brands, $10 to $195, all in stock when this was written. We would not buy all of them, and neither should you. barenecessities.com's Chenille Cable Knit Crew Beanie at $10 is the low-risk way in, and Eric Javits's Beanie w/ Pom Pom at $195 only makes sense if this is a category you already use constantly. On blue supreme beanie specifically: the difference between the top and the bottom of this list is real but smaller than the price gap suggests. Nothing here is included because it is famous, and price is not used as a proxy for quality anywhere on this page. If you take one thing away: if you would not buy it at full price, you do not want it on sale.