Help regarding cylinder.

My girth is 4 inches, and in my country penis pumps with 1.5‑inch cylinders are not available. Here, only 1.75‑inch cylinders are available. I’ve heard that you should always choose a cylinder according to your size, but I’ve also seen that Hink’s method is to think like a medical professional and they have genuine knowledge. So please tell me, can I use a 1.75‑inch pump and start my journey?