Does this suit me?
'Sta bene' — 'sta BEH-ne'. The 'e' in 'bene' is open. In rapid speech: 'stabene'.
Asking the assistant's opinion after trying something on. A genuine question in Italian shops — you'll often get an honest answer.
'Stare bene' with clothing = to suit/to look good on. Structure: indirect object pronoun + sta bene + item. 'Mi' = to me. 'Ti sta bene' = it suits you. Subject is the clothing.
Mi sta bene?
Does it suit me? / Does it look good on me?
Shortening — just 'mi sta bene?' is enough
Come mi sta?
How does it look on me?
More open question — inviting any feedback
Mi sta bene il colore?
Does the colour suit me?
Asking specifically about colour fit
Italian shop assistants are culturally conditioned to be honest about fit — saying 'le sta benissimo' when it doesn't would embarrass them professionally. Trust their feedback, especially in boutiques.