What width/depth of curtain do I need?

[owthathurts]

I'm off curtain shopping this afternoon and can't decide on what width/depth curtain I would need!

My window is almost square - approx 45 inches wide and 46 inches deep.

Thanks in advance

[Cantspell2]

Are you looking for ring tops or tape. If tape you want a fuller curtain so to allow for gathering so probably a 66 x 54.