Measuring T-molding

[greywolf22]

Ok, I've got a really stupid T-molding question, but I've been working on my cab all day, so my brain is a little fried  

I'm wanting to replace all the old t-molding on my current cab (an old Top Gunner cabinet), with brand new t-molding.  The original is cracked in a lot of places, and just missing in others.  My question is, how do I know what size t-molding I need to replace it?  Where do I measure?  I've been out looking at t-molding websites, but they have various sizes such as 3/4 " 5/8" etc.  I'm mostly looking to replace the current stuff with the same size, but wasn't sure if I just measured the width of the molding or there was an easier way.  Any help would be great.  Thanks  

[Tailgunner]

Measure the thickness of the panel, order the T-molding using that dimension. Checking the slot width is a good idea as well, 1/16" t-molding will fall out of a 5/64" slot where you'll be hard pressed to force 5/64" t-molding into a 1/16" slot without damaging the panel.

[greywolf22]

Thanks  

I'll do just that.