Butterick 6643 sewing pattern, dated 2018, now out of print.
Designer: Patterns by Gertie.
Misses Corset:
Close-fitting underbust corset features self-lined and interfaced front and back, contrast side panels, flat steel boning, twill tape waist stay, two-piece grommets and back ribbon lacing, and lingerie elastic for hanging. No provisions provided for above waist or hip adjustments.
Sizes 6 8 10 12 14:
Bust 29 1/2 - 30 1/2 - 31 1/2 - 32 1/2 - 34 - 36 inches / 77 - 80 - 83 - 87 - 92 cm
Waist 23 - 24 - 25 - 26 1/2 - 28 inches / 58 - 61 - 64 - 67 - 71 cm
Pattern is UNCUT and factory folded. Envelope is as new.