Please help: Measure your Grados!

Hello Head-fi

Im working on a DIY project and would appreciate it if you could help me with some quick measurements.

I would like to put together a table of the HEIGHT of various Grado and Alessandro headphones.

It is important that all headphones are stock! If they have been disassembled (re-cabled or otherwise modified) at any time please note that. To make things easy on everyone, please use the metric system (milimeters) to measure. It is OK to round to the nearest mm if you have tools that measure better, but accuracy to 1mm should be obtainable by anyone and I think good enough for this kind of informal survey.

Please measure from the 2 outermost points shown:


It is often helpful to measure from a few cm in on the ruler, and subtract. the ends of rulers get all chewed up...

If you can confirm someone elses measurement, please just quote them and type "confirmed"

I will quote you for credit & edit your response info into this post so that its easier to find as time passes. I filled in all of the grados models I could think of, with all well known variations so that if there is a change from model to model it may be noted.

Thank you all in advance for your help.

Grado:

SR-60 23mm

SR-60i
SR-80
SR-80i
SR-100

SR-125
SR-125i

SR-200
SR-225
SR-225i
SR-300
SR-325 (black) 35mm

SR-325 (silver)
SR-325i
.
HF-1
HF-2 33mm
RS-1 (very very old, oldest vintage) 40mm

RS-1 from somewhere in the middle there
RS-1i
RS-2
RS-2i

GS-1000

GS-1000i
PS-1
PS-1000
HP-1 (with switches)

HP-2 (without switches) 34mm

HP-3 (at least confirm if its the same as the HP-2)

Alessandro:

MS-1
MS-1i
MS-2

MS-2i
MS-pro

Its hard to keep track of them all. Im hoping a few people will chime in on the RS-1 because it is particularly interesting to me with so many differences from generation to generation.

If there are dimensional differences, I will add to the options there.

Thanks to everyone who has posted so far. The list should fill up nicely at this rate.
Im curious if there is any correlation between the length of the headphone and the generally agreed on sound differences & measured differences model to model.

I suspect there may be some variations from sample to sample, but I think this will get close enough for my highly unscientific methods.

My end goal is to pick a "new" length and have someone make me a set of Grado cups to experiment with the whole length VS the "overall sound" of the headphone. I dont think a database like this has been put together so maybe someone else can use it too. I recall there was the head-fier in Europe who made a set of beautiful aluminum cups for his headphones, perhaps a list like this will help the next guy.