The size is not customizable. As you can see in the pictures, the figure has a small stand for better support. It has soft felt on the bottom of the stand. The stand can not be separated from the figure. Small imperfections are not attributed to a manufacturing flaw but to the uniqueness and quality of the product, entirely handmade.
Some work incorporates both hands and machinery during their crafting. That is why you will not find the same two products. You should also be aware that handmade products may have some color differences or small signs of binding between the various parts due to the molds used. These are all signs proving that the products aren't mass produced and imperfections are all characteristics of handmade products.