Same jeans, different first day. The L720 Biostone Wash takes ONI's women's wide straight and puts it through a biostone wash — enzymes and stones working together to lift the indigo evenly and break the fabric in — so it arrives the way a good pair looks after a couple of years of wear: a clear, light blue with soft whiskering at the hips and seat, and a hand that has already given up its stiffness. Nothing to wait for.

The denim underneath is the same 12oz selvedge, low tension woven on vintage shuttle looms from a mix of yarns in different thicknesses; after the wash, that irregular yarn shows as a fine, uneven grain across the pale surface, which is where the fabric keeps its character. And the pattern is the one ONI drew from a blank sheet for its Ladies line — not a scaled men's block, but a block built for a woman's body, with the waist and rise balanced and the back pockets placed for a clean, vintage line.

The cut is a wide straight with a high rise and a generous, straight leg from the thigh to the hem, easy to wear cuffed with sneakers. Construction is full ONI: custom copper doughnut buttons on a button fly, original punched rivets, a cowhide leather patch and the selvedge ID at the outseam, with the women's line's signature purple thread at the coin-pocket opening and the inner bar tacks of the back pockets. 100% cotton. Made in Japan.

ONI makes the L720 in two versions, zip fly and button fly, and we stock the button-fly L720-12B. It is the more traditional construction — the one on every vintage pair this pattern looks back to — and the one that ages best: a button fly keeps the front flat and clean, never fails the way a zip can, and its placket wears in along with the rest of the jeans.

Fit Notes: This model fits true to size — we recommend taking your usual size. ONI's women's sizes run 0–4; as a guide, a size 1 measures 27.2" at the waist and corresponds roughly to a 25–26 in American brands, a size 2 (28.0") to a 26–27, and so on. The cut is a wide straight with a high rise and a generous, straight leg from the thigh to an 8.3" opening. The denim has been biostone-washed, so it is fully shrunk and soft from the first wear. With regular wear, the waistband will stretch approximately 1 inch, allowing the fit to settle comfortably over time. We don't recommend sizing down, as starting too tight may cause discomfort and alter the intended fit of the garment. As always, we strongly recommend checking our size chart to find your perfect size.