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What size curtain would I buy for my kitchen with these measurements?

Question by shanell: What size curtain would I buy for my kitchen with these measurements?
I am a new home owner and I have no idea how to purchase curtains. I need new cutains for my kitchen window. (I would like to buy the valance and the curtain that goes underneath the valance...I think you can buy it as a set though)
My window is 47W x 57L. What size valance and cutain would I buy? Can someone help me please?
Thanks.