Obakki black blazer suit jacket office work career size 10 fits US 6 wool Canada

Obakki wool blazer jacket. Fabric doesn't stretch. Measurements (taken flat, non-stretched, multiply by 2 for full circumference): - Length: 30 in/ 76 cm - Chest (armpit to armpit): 18 in/ 46 cm - Shoulder to shoulder: 15 in/ 38 cm - Sleeve: 26 in/ 66 cm Size 10 on tag, however, fits more like US 4-6. New without tags.