55-59 big window help!!

[Gsanche3]

Does anyone know the measurments of a 55-59 rear big window. I turned my 56 small window into a big window but my glassdoesnot fit. Its to shor width wise. I purchased the glass at a automotive swapmeet and I was told that it was made for 55-59 chevy. Now I am confused I hope its just the glasd and not the big windo frame. I was thinking that the rear glassI havemight be for a ford. Please help.thanks
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