I usually do three basic formats of commission, but anything and everything is available really.
1) A4 Single Character Pencilled/Inked/Spot Colours if applicable - These cost €125/£100/$150.
Examples below.
2) A3 Single Character Pencilled/Inked/Spot Colours if applicable - These cost €200/£150/$250.
Examples below.
3) A3 Montage Multiple Characters Pencilled/Inked/Spot Colours if applicable - These cost €300/£225/$350.
Examples below.