German phrase
Welche ~ wäre das bei Ihnen?
Meaning
Which ___ would you like?
When to use it
Asks which option you want. Polite and useful when offering choices in a service setting.
Example dialogue
Welche Farbe wäre das bei Ihnen?
Which color would you like?
Ich nehme die blaue Jacke, bitte.
I'll take the blue jacket, please.