The size 5.9" X 5.9" X 5.9" is perfect for saving money, and the opening is 3.5" wide, which can insert money easily and looks spacious. Constrain yourself to save money when you are preparing a savings plan, such as you are saving money to realize your wishes, or saving for vacation with your friends. Throw the money in this savings bank instead of spend more dollars floating in your wallet. This can help you to spend money as planed. This metal piggy bank with no stopper, you can only break it with a hammer if you want to take out the money, it is a very special and funny design. This savings bank is made of stainless steel, the grinding is even and smooth, suitable for everyone, especially for the people who does not have strong self-control.