Horseman 6x Long Focusing Loupe

Can anyone tell me the length of this loupe. I have been using the Toyo 3.6x for years to focus through the open hood of my Technikas but my eyesight is not what it used to be and I am having difficulty focusing. I am hoping that the Horseman would be a suitable option presuming it is at least the same length as the Toyo ( about 3-3/4") and that I can get roughly -2 diopter correction which is what I use on my Hasselblad and Leica. Are any users finding it to be a good choice?

Yes I love mine I have about 5 different one, but the long Horseman ist most in use! Mine is 4 1/2 inches a bit shorter if its on the shortest, but corrected for my eyes its exactly 4 1/2 inches or 11,3 cm!

Thanks Armin. That's the information I was hoping for. I have gone ahead and ordered one.