For standard Botox, 20 to 40 units are typically used per area.
A single unit of botulinum toxin costs between $15 and $20 on average, Idriss says. The number of units used on one person depends on how significant their wrinkles are and how aggressively they want to treat the area. For example, someone getting "baby Botox" might receive 10 units per area. For standard Botox, 20 to 40 units are typically used per area.