As injuries at work can be life threatening, you must be able to reach a kit within 60 seconds.
If your staff are split over more than one floor, you must have at least one kit per floor. First aid kits should be positioned where people see them every day, so that, in the event of an emergency, people will remember where to find them.
 
Small = 1-10 Employee
Medium = 11-20 Employee
Large = 21-50 Employee