i've heard it's always best to go with the smallest size to avoid looking plastic... is this true? has anyone had good results with the medium or larger sizes?
if you have a good surgeon they're probably go with a medium and shave it down during the surgery, so you end up with a size somewhere between a small and a medium, that is the most common size that looks good. however i don't know your face so would you post or private message me a pic and i'll try and help.
The nice thing about cheek implants unlike every other facial proceduce is it's reversible! So thankfully if you get too large you can get the next size down. To answer your question yes I would say it's generally better to go smaller. Even though you can get them re-done, that will double your recovery time and OR/anesthesia costs.
You should go for a medium size. If you have an experienced and good surgeon then he/she will cut it down according to your cheeks, and it will be perfect for your cheeks.