How To Measure Speaker Size For Foam. Instructions / need smaller size” / how to measure foam / how to section. All speakers have a magnet.
It's not just about the diameter of the speaker's cone or the cutout diameter, which is a common misconception. Check the diameter at the widest point of the speaker’s mounting frame. This is basically the length from one end of the diameter to the other.
This will make sure that you get speakers that will fit into their spaces.
Unfortunately, the info there tells how to measure for a replacement diy refoam kit. This surround is an angle attach but will work on flat attach speaker cones. Products foam surrounds surrounds by size rubber surrounds glue, brush, syringe dustcaps This is the maximum diameter and the minimum space needed in the speaker box to accommodate them.