Vintage cowboy boot size 5.5/6

silver rivets, angel wings and crosses. beautiful stitching and detail well loved boot with lots of life but could use a cleaning and conditioning. heels and soles in good condition.toes show wear. I purchased these from an online resale platform not knowing the size and they don't fit. heel to toe measures 9 3/4 inches. no known size. I wear a 6, so im guessing they are a 5.5. please ask any questions not returnable. height 12" heel 1 1/2"