When a company launches its IPO in share market, it divides the total shares it intends to offer to the public. In the case of IPO stocks, investors may not purchase any quantity of shares, unlike regular stock trading. They must instead purchase the shares in lots. The company fixes the maximum and minimum lot size before launching the IPO. This is known as market lot size or IPO bid lot. For instance, let's say the company sets a lot size of 10 shares for each lot. The minimum lot you can purchase is 1, and the maximum you can purchase is 10. This essentially means that if you buy 1 lot, the minimum number of shares you can get is 10, and you cannot buy more than 10 lots or 100 IPO shares. Thus, if you wish to buy 75 shares, you cannot do so. You must choose to buy 7 or 8 lots, i.e., 70 or 80 shares, whichever is the closest to the multiple of 10, which makes up 1 lot.