Should my Zegna suit jacket be tailored on the back and/or sides?

[AdaZegnaSuit]

I have a "slim" Zegna suit bought off the rack from Saks. I don't expect it to fit amazingly, but so far it feels OK, minus the annoyingly low arm holes/American style jacket.

So far, the only jacket alteration has been the sleeves which are perfect length now.

Going by my pics, should I have tailor bring in the sides or the back of the jacket (using the side seams, not taking in the middle back seam) just a little so it's more fitted looking? I am pretty fit and have a v-shaped torso and sloped shoulders, but it does feel like the jacket could be a tad more snug and hug my waist more. I also can't tell if it looks too loose from the back, with some of the vertical lines on the suit jacket, rather than the fabric being completely smooth on my back. I understand I can't get bespoke results here but I'm curious if the jacket looks a little big in the back and sides. Ignore the dress shirt sleeves, those are being shortened. Thanks very much.

Suit: 38 short, 'slim' fit
Height: 5ft 8 in
Weight: 155 lbs

 

[KOz]

The whole suit is already too tight. I bet the trousers will be a real pain to sit down in. I wouldn't recommend taking in anything.

I also can't tell if it looks too loose from the back

Your back isn't suppose to be entirely smooth - you need fabric for movement.

 

[The Noble Dandy]

For those that live in the USA - the suit will probably look too tight.
For those that live in Europe - you could probably take in the sides if there would still be enough space for you to move comfortably. I also don't like the upper part of the back - it looks like it's too wide for you. I wonder if it would be possible for the tailor to do some changes here too.

 

[KOz]

For those that live in the USA - the suit will probably look too tight.
For those that live in Europe - you could probably take in the sides if there would still be enough space for you to move comfortably. I also don't like the upper part of the back - it looks like it's too wide for you. I wonder if it would be possible for the tailor to do some changes here too.

Interesting take. I'm from Europe and think it's too tight.