KOIO Chelsea Boots in Walnut, size 41

Beautiful new pull-on Chelsea boots by Koio in color “glossed walnut”, a shiny brownish reddish neutral with black sides and soles. These are really beautiful boots, but I should have gotten a size bigger— they are too small for me. EU size 41 fits about a 10.5 or small 11. Worn only once around the house, so in brand new condition. Questions or comments welcome!