Measuring Pool Liner

[chavez35]

I have a 30' AGP that is in need of a replacement beaded liner, but unsure how to measure the depth of the liner. I measured 50" from the bottom of the pool to the top of the bead, but liners only come in 48, 52, and 54 inches. Do I need to also compensate for the cove in the measurement? Thinking I will need a 52 or 54, but wanted to get the expert's input on this one before purchasing.

Thanks for you help!

 

[Buckmaster]

I'm not the expert but for mine I was Told to measure the height of the wall and use whatever number it's closer to. Ex: measured =51 liner is 52