Increase font size in printing

Version 4
3

I can not put big letter

order kitchenactual

20150929_093247.jpg2048×1232 519 KB

I want to order

-1cognac 3 Palos/Poca Sal, Desordenado, con azucar
-1cognac Courvoiser/Desordenado
-1Whisky Chivas Regal/Con Azucar

I want to have the letter in size 18

THANK