Copper size for a new restroom/shower/toilet and sink

[lupe]

What should be the copper size for an addtion to a house ?

Its a restroom the includes a shower/toilet and sink.

Thanks in advance.

 

[Randyj]

Ideally you would have 3/4" water supply with branches to each fixture using 1/2".

 

[Sponsor]

 

[Markts30]

3/4 would be sufficient (as stated) if the shower is a standard single head unit....
Custom units tendt o need larger lines....