questionscan you use a otterbox made for a iphone 5 if you…

vote-for4vote-against
vote-for7vote-against

iPod Touch 5 dimensions: 123.4mm x 58.6mm x 6.1mm
iPhone 5 dimensions: 123.8mm x 58.6mm x 7.6mm

The .4mm difference in length, no biggie.
The 1.5mm difference in thickness - biggie.

Unless you have the case already, I'd look for something product specific instead.

vote-for1vote-against

As the other commenter said, it would offer no protection - the touches are so much thinner than the phones. It wouldn't fall out, but it wouldn't be secure enough at all.