Depends on the size of the drink. It’s a liquid sugar we use not sugar packets.

Tall-3
Grande 4
Venti 6
Trenta 7
Standard used to be liquid cane syrup so they will probably assume that one, but you can ask for classic syrup .
Liquid cane syrup is pumped with "half pumps" and (depending on the store, I know my district does this) classic is with full size pumps but some do it with half pumps so you'll have to ask when you go first time. It's good to keep in mind if you're wondering why things taste weirdly inconsistent

You can also just ask specifically for however many pumps you would like or ask for packets of sweetener (stevia/Splenda).

liquid cane, standard cold pumps (3/4/6/7)