Jersey fit
 

I have read this before but I don’t remember how it goes. I am still overweight so sizing can bectricky.
If a jersey is advertised at “sport fit” is it neant for skinny Euro cyclists or is it a looser cut?

There is no set answer for this, every brand is different and even the claimed sizes can vary heavily. Sport is usually looser than race or club fits in my experience but even terms can vary from brand to brand.

Thank you. I didn’t check rhe fit on a jersey I bought before ordering. I just wanted it for how ut looked.

If I'm just guessing based on intuition, sport fit would be looser and race (or pro) fit would be tighter.

If it is manufactured in Europe or the Far East, plan on sizing up at least one size and possibly two for jerseys.
Even when in good cycling shape, at 6'2" 200 lbs, XL with a club fit will be tight in the shoulders and chest for most brands.
I guess tight is better than any flapping.

As for sizing, I don't buy anything that doesn't have a size chart with chest measurements. That way I at least know it's an appropriate size. The "cut" of the jersey that you're referring to is a bit of a gamble. Hard to know how it will fit you. Certainly a "race" fit will be tight. And if you are overweight, then you're likely bigger in the middle than across your shoulders, and most anything may be a bit tight in the middle unless loose higher up. You obviously want one that looks loose in the middle on the models in any of the marketing photos.

I'm still heavy for a cyclist, but prefer a tight fit as I hate flapping fabric. If you are concerned about showing your rolls and "moobs", consider wearing a tighter base layer underneath. Some riders prefer sleeveless base layers, even in warm weather. And something tight can also help reduce the jiggling and be more comfortable.

I forgot to order a size larger for my latest jersey. I guess I need to work harder to get rid of my gut so it won’t look like a sausage casing.

You aren't the only one on this forum trying to do that.

Nominal size differences vs reality, are often a function of Euro brands offering 7 sizes of fit, and US-centric brands only offering 5-6.

Yes, the names are very subjective. Companies use different terms to give the customer an idea (more confusion?) as what to expect. If they have sizing measurements that will help. If you can contact the company producing the product that will help too.
In the US I usually purchase and wear an XL. In Asia I wear either a 2XL and sometimes a 3XL. Still the same size when compared to my US XL.

I just ordered club kit. Sport fit means for someone thin and fit. Club fit accommodates a belly, but will flap a bit in a wind.
I go for Club fit myself. If I ever get to where I need a sport fit, I'll reward myself with new kit. ;)