You should provide a minimum of 3-4 square feet per chick that is free of drafts. Keep in mind that as they grow, they will need more space per chick.
Your chicks will need a warming zone and a cool down zone in their brooder. They need enough room to be able to move freely between the two zones.
Pine shavings are one of the best options for bedding. You should NOT use cypress or cedar (both are toxic to chicks), sawdust, or sand.
Heat Lamp or Brooder Plate: You will want to place a heat source on one side of the container.
If you choose to use a heat lamp, make sure it is secured. They can catch fire if proper safety precautions are not followed.
If you choose to use a chick brooder plate, follow the manufacturer's instructions.
Place your chicks in the heated brooder as quickly as possible. As they begin to warm up, they will become more active and begin exploring. Cold chicks will remain huddled up together.
Week 1: 95 Degrees Fahrenheit
Week 2: 90 Degrees Fahrenheit
Week 3: 85 Degrees Fahrenheit
Week 4: 80 Degrees Fahrenheit
Week 5: 75 Degrees Fahrenheit
Week 6: 70 Degrees Fahrenheit
After 6 weeks, the chicks should be feathered and free to go outside.
You will want to use a thermometer to monitor the temperature of the brooder.
These are just the minimum requirements to get you going. Please take time to research. There are several agricultural extension articles that can be found online that will go into more detail of proper chick care.