Measurement of the three Farberware Lids I have - Across the opening - from one edge that drops down inside the pan to the other side of it:  two larger ones - 6.5", and one smaller one - 5.25".
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My pictures make the pans look like they are copper-colored.  They are not.  They are silver-colored.  That coloring is a reflection of the table I had them sitting on when I took the pictures.  I took the background (which included the table top) out on one of my pictures, but that didn't take the color out of the pans.  I left the background in on one so you could see that that is the case.  I actually have three lids and if you like I will send all three to you.  Just tell me - and before I get it wrapped  up.