Thank you for a great question. The answer depends on a few factors to consider: 1. The type of product used. 2 The degree of volume loss 3. Your age 4. The type of result you are tying to achieve. You will also need a consultation because if the cheek filler is injected corrected and enough of It is used, you may not even need an under eye filler. The best fillers for cheeks are Juvederm Voluma or Restylane Lyft and the best fillers under the eye is Restylane Silk. I find that minimum amount a person needs to correct volume loss in midface is 2 syringes. 3rd syringe may be used around the eyes. You will not see ANY improvement with a single syringe in the mid face. I will suggest that you save up and inject the needed volume to achieve full correction. The price on Average is between $700- $1300 for a syringe of product needed to be injected. You are not paying for product, you are paying for experience and expertise of the injector. Please find an expert in your area and go for a in person consultation. Hope this helps. Best, Dr.Avaliani