I found this info on an Astra which I think is the same as a corsa as the space saver I got was from an Astra and it fits ok
I could not find any for the corsa
For Astra J 5-door hatchback, Sports Tourer and 4-door notchback with 1.4, 1.6, 1.4T and 1.3CDTi engines (J67 braking system):
PCD 5x105 (distance between neighbouring bolts is 61.7mm), centre bore 56.6mm
16" wheels: 6½J x 16 offset 39, tyre 205/60R16
17" wheels: 7J x 17 offset 42, tyre 215/50R17
18" wheels: 7½J x 18 offset 42, tyre 225/45R18
19" wheels: 8J x 19 offset 46, tyre 235/40R19
Space-saver spare: 4J x 16 offset ?? (BNX), tyre 115/70R16
Standard winter wheels are 6½Jx16 offset 39, tyre 205/60R16, other options possible.
Front brake discs: 276mm
Rear brake discs: 268mm
For Astra J 5-door hatchback, Sports Tourer and 4-door notchback with 1.6T, 1.6CDTi, 1.7CDTi and 2.0CDTi (inc Bi-Turbo) engines (J60 braking system):
PCD 5x115 (distance between neighbouring bolts is 67.6mm), centre bore 70.1mm
16" wheels: 6½J x 16 offset 41, tyre 215/60R16
17" wheels: 7J x 17 offset 44, tyre 225/50R17
18" wheels: 8J x 18 offset 46, tyre 235/45R18
19" wheels: 8J x 19 offset 46, tyre 235/40R19
Space-saver spare: 4J x 16 offset ?? (FTW), tyre 115/70R16
Standard winter wheels are 6½Jx16 offset 41, tyre 205/60R16, other options possible.
Front brake discs: 300mm
Rear brake discs: 292mm