Formillion Expansion Kit – 54-64cm – 3D Print STL File

Part of the Formillion adjustable head-sizing and hat-shaping system — a modular tool for tailoring the fit of cowboy, festival, and western-style hats to different head sizes without needing a separate fixed block for each size. What you get: an instant-download STL file, ready to slice — no physical item is shipped. Designed to click together with other Formillion parts, sold separately where noted. For personal and commercial use of the printed tool. Resale or redistribution of the file itself is not permitted. At a 64cm head circumference, this specific size corresponds to a US/UK hat size of approximately 8 — handy if you're more used to sizing by hat size than by a tape measure in centimeters.

Not listed individually yet — visit our Etsy shop to ask about this item.