IPhone 4s back glass on an iPhone 4?

So I own an iPhone 4 and i have to replace the back glass with a new one and eBay is the cheapest place. I found one for the cheapest price but it's for an iPhone 4s. Will an iPhone 4s back glass fit on an iPhone 4?

Can you be more specific please?

Yes, 4/4s are the same size.

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