Here is Butterick Pattern # 3778 UNCUT Misses Top, Skirt, and Pants in Sizes 8, 10 and 12. Designed by David Warren.
Loose fitting partially lined top has collar, peplum and below the elbow length sleeves with slits. Semi-fitted straight lined skirt below mid knee. Loose fitting tapered pants,evening length with elastic waistband and back zipper. Skirt--back vent. Pants--side slits.
Size 8 -- Bust 31 1/2 Waist 24 Hips 33 1/2 inches
Size 10 -Bust 32 1/2 Waist 25 Hips 34 1/2 inches
Size 12 -Bust 34 Waist 26 1/2 Hips 36 inches
The pattern and instructions are still factory folded. The envelope has some wear from storage.