As it stands, is full (25) : -
Non homegrown (17)
Courtois
Caballero
Azpilicueta
Alonso
Zappacosta
Rudiger
Emerson
Luiz
Kante
Bakayoko
Pedro
Willian
Jorginho
Hazard
Morata
Batshuayi
Giroud
Homegrown (no more than 8 if you have 17 non-homegrown)
Cahill
Christensen
Fabregas
Drinkwater
Barkley
Moses
Loftus-Cheek
Green
U21/Academy (as many as you like)
Ampadu
Hudson-Odoi
Abraham
Musonda