CB4000 or The Curve?

Hi everyone, I’m traveling at the moment and found a shop selling CB4000 models for quite cheap (around 80 euros). They had some on display, so you could check the sizes. The one in the showroom looks just like “the curve,” but I’m not certain if they’re identical. The reason for my question is this: I want to buy a cock ring (CB), and since I have a fairly thick penis, I’d prefer a wider one. Online specs for “The Curve” state an internal diameter of 1 1/2 inches (about 4 cm), but when I measured the display model myself, it seemed more like 3.8 inches (about 3.5 cm). I’m unsure if this is just a smaller version or if the online information is incorrect… It’s such a good deal that I’d hate to miss out:D So, does anyone here own “The Curve” CB and could measure it? Or perhaps offer some advice. Thanks!:hi: