Technically speaking there are 3 types of lots
1. Round lot
Any number of shares that is a multiple of 100 is a round lot (i.e. 100, 600, 1,600, etc)
2. Odd lot
An odd lot is a number of shares less than 100 (1-99)
3. Mixed lot
An order for a number of shares greater than 100, but not a multiple...