Need to tighten shirt...? i've got a modern top and although it fits ok....i want it...

i've got a modern top and although it fits ok....i want it a little tighter, lately like how jeans fit more snuggly after a mop up,

will it get better if i valet it? or is it at it's best new?

it's pure cotton, wash instructions thirty degrees....
Answers:    You could try putting it within the dryer for about 45 minutes short washing it. Is it preshrunk cotton?

If so afterwards you could try adjusting it yourself. Hopefully you own a sewing machine handy. Just brand sure your stitches are parallel to the original seam, just closer in. And try on the shirt in the past you cut off the artistic seam.
yup.