In this sizing scale, Extra-wide means frames for faces measuring 145–154 mm. Faces measuring 155 mm or more are XL / specialty wide and need a purpose-built front; Woolet uses a 158 mm front for its 155–161 mm standard fit range.
Both shapes are prescription-ready, with 52 × 52 mm and 54 × 50 mm lens areas for single-vision or progressive lenses. Italian Mazzucchelli acetate, hand made in EU. The shop is sold out until the Kickstarter campaign ends; a $1 reservation locks the $114 founding-member price against the $190 MSRP.