It seems that the shape of the bottom is considered so as not to tread over the soil of the field. When digging soil which is thin at the bottom and hardened at the scoop, if you try to put your feet on the shoulder of the scoop and apply your weight, you will feel the hardness of the scoop on the sole of the foot. It is the bottom, but the impression that it is thin overall. I use a thick felt material insoles at all times, on top of which I use a thin insoles to replace one more frequently. Since boots for vegetable garden smells with sweat, we chose the size on the premise of laying insole from the beginning. Usually shoe size 23 ~ 23.5 cm. I like colors and shapes very much.