Handmade and Hand Thrown Bonsai Pots widths or lengths: 8 inches and wider (203mm to 330mm+) The Bonsai Pots are made of heavy duty Stoneware clay fired to high stoneware temperatures, making the pots non-porous and freeze/thaw resistant. The pots can also be used as Cactus and Succulent pots. Some pots have extra drain holes, others have extra wire holes for your Bonsai. Dimensions are given in the descriptions. All glazes are lead free.