How does it fall at the back?
'Dietro' — 'DYET-ro'. The 'ie' is a glide — one syllable. Stress on first syllable.
Asking the assistant to check how the garment looks from behind. Italian fitting rooms don't always have three-way mirrors — asking staff is natural.
'Cadere' in clothing = to fall/drape. 'Come cade' = how does it fall/drape. 'Dietro' = at the back. 'Davanti' = at the front. 'Di lato' = on the side.
Come sta dietro?
How does it look at the back?
'Stare' instead of 'cadere' — slightly less technical
Può guardarmi dietro?
Can you look at my back?
Asking staff to check specifically
Il fondo è dritto?
Is the hem straight?
Checking if the hem falls evenly
The way a garment 'cade' (falls/drapes) at the back is critical in Italian fashion. Skirts and dresses should fall evenly; jackets should not ride up or bunch. A good drape distinguishes quality clothing from poor construction.