This is a general standard to go by, but you may want to change, based on your taste:
12 oz - 1 short shot (called "Ristretto" ) (.75 oz. to 1 oz.)
16 oz - 2 short shots (use double portafilter) ( 1.5 oz. to 2 oz. )
20 oz - 3 short shots or 2 long shots ( called "Lungo" ) (1 long shot is about 1 oz. to 1.5 oz. a double long shot is about 2 to 3 oz.'s)
12 oz drinks use about 1 oz. of syrup or sauce or a combination of both.
16 oz drinks use about 1.5 oz. of syrup or sauce or a combination of both.
20 oz drinks use about 2.0 oz. of syrup or sauce or a combination of both.
When building your espresso drinks:
1st add syrups or sauce to cup
2nd add espresso
3rd add steamed milk (140 - 160 degrees)
4th add whip cream and topping if desired
If you are using pumps on your syrups or sauces, here is the measurements:
Syrup Pump is .25 oz's
Sauce Pump is .50 oz's
I hope this help give you some guidelines to go by!!