System Restore points are located here:
C:\System Volume Information\_restore{6EFB3312-5B30-4CC4-B9A7-CF16443E8C25}\
Looking at my restore points, each of them are about 40 to 120mb.
In 200mb, I would think about 1 or 2 restore points can be saved.
In 1122mb, maybe about 11.