Single Pen Leather Holder Slip Sleeve Case (Tan)

Would it fit a woerther compact fountain pen? hexagonal shape, about 1/2 inches diameter in the body, and about 5/8 in the clip section. thanks

will it fit a delta dolcevita?

I am searching for a pen to carry a nakaya naka-ai i have coming. would this single sleeve be large enough or should i consider the double?

I want to carry a zebra f301 and m301 in the same slip, will this for both, or should I get the wider one?