I'm so glad my office has loosened their dress code over the last few months, because T-Shirts and jeans really can be work appropriate, IMO, if you do it right.
I used some heels and a cardigan to dress this T-shirt + jeans look up. Click here to view my last T-shirt + jeans work look.
I actually got almost all of these pieces on the sale rack somewhere (except for the purse obv). The t-shirt was only $10 and I LOVE the print!
Keys to making this look ok for the office:
*trouser style jeans
*nice purse helps
T-Shirt: Urban Outfitters
Trouser Jeans: Banana Republic
Cardigan: Banana Republic
Linen Peep-Toe Heels: Banana Republic