It is not slim fit but neither is it regular. Slightly narrower cut.
In normal brands I wear Large.
In this particular shirt, the L is somewhat tight on the shoulders, while the XL is on the large side.
I chose XL.

Very nice in dark denim.
The fabric is good quality and soft.
However, I wouldn't call it value for money at the list price of 39.90 Euros.

It is definitely not slim fit but has a regular fit. Although I now own the product, if I could turn back time I would not choose it again.

Full misinformation about the size.
It has a regular fit, I took my size and it fits perfectly.
1.90 height 95 kilos XL.
Very good product.

Definitely needs one size up from the usual! It has a slim fit and maybe needs one size more than usual!

It has a regular fit, kids, it's not a slim fit as they say. I am 1.78 meters tall and weigh 88 kilograms, and I wear XL in all shirts, and it fits me perfectly. However, the quality is excellent. I have more expensive denim shirts, and they are not of this quality. I recommend you to buy it

Very good for its price. Definitely one size larger due to narrow fit.
EDIT: I bought 2 more shirts which I consider perfect for my tastes.
EDIT 2: After a year of use, I bought another one.
I recommend them.

For the money (~30€), it is a very decent casual shirt of good quality, 100% cotton, and from a reputable brand (for those who are interested). However, as mentioned in other reviews, it does indeed require one size larger than what you usually wear, as it seems to be a slim fit.

Very nice shirt but definitely get a size larger than what you wear! My husband wears Medium in all clothes and is slim, but the Medium was tight on him. The Large fit him perfectly!! Great fit exactly like in the photo, color and design!

Nice little shirt, good material but the size doesn't exactly correspond, for example, the L fits me like a Medium.

Also, after a few washes, it tends to shrink a bit.