It all depends on what the hatchery has available. Most hatcheries do have a box that hold 100 chicks, so it is theoretically possible to order as many boxes of 100 as you want. The only limitation is how many chicks the hatchery actually has available at this time of year. The standard box sizes are 25, 50, and 100, I believe, although a few hatcheries will sell fewer than 25. My suggestion would be to call the hatchery and see what they have available and when they'll have them.