Is there a mirror?
'Specchio' — 'SPEK-kyo'. The 'ch' before 'i' makes a 'ky' sound. One of the trickier sounds for beginners.
When you're trying something on in the main floor and there's no mirror nearby. Full-length mirrors may only be inside fitting rooms.
'C'è' = there is (ci + è). 'Uno specchio' — 'specchio' is masculine ('lo specchio' with 'lo' because it starts with 'sp'). 'C'è' is used for a single item.
Dov'è lo specchio?
Where is the mirror?
When you can see there's one but can't find it
C'è uno specchio intero?
Is there a full-length mirror?
Specifying you want to see the full outfit
Posso guardare allo specchio fuori?
Can I look in the mirror outside?
Asking to leave the fitting room to check
Italians take great care examining how clothes fall and move — 'come cade' (how it falls) is a key phrase in Italian fashion. The visual effect in motion matters as much as the static fit.