All televisions are manufactured with a standard bolt patterns that comes in three or four sizes and are measured in mm. I believe that they are called VESA standards. There is a great explanation of this at https://www.abt.com/learn/vesa-standard-guide
. Take your tv down and measure the distance between the mounting holes in mm and then establish which mount size you need. They are classed as MIS-B thru MIS-F and the television you buy will have that size designated on the box.
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