Firstly, know your tailor: know how good he is, and secondly, Â at price he charges for his work. Â If you are not even happy with his "easier work" like cuffing your pants or shortening sleeves, then you might not want to consult him for such a big project. Â Things that can be done: 1)\tTaking in chest, (~$15 and up) 2)\tTaking in upper and lower waist (~$15 and up) 3)\tMoving closure buttons in or out within 1/8" Â (~$10) 4)\tShortening skirt of jacket to maintain proportion, front or back (~$20 and up) 5)\tShortening sleeve length (~$20 to $30) 6)\tTapering cuff width (~$20 to $25) 7)\tAdjusting cuff angle (horizon) (~$15 to $20) 8)\tOpening sleeve button holes (~$10 to 15 per button) 9)\tTucking in excess fabric at back-of-neck under the collar (~$15 and up) 10)\tTaking in pants waist within 1" (~$10 to $20) 11)\tShortening (or lengthening, if material available) of pants length (no more than $15) 12)\tTapering pants leg ($15 to no more than $25) 13)\tTapering pants cuffs (~$10 to $15) 14)\tShortening shirt sleeves ($30 --- kind of a market price) 15)\tMoving neck button on shirt to expand neck size 1/2" ($10) Prices are quoted based on tailors in New York who do excellent alterations (for example, hand sewn button holes), assuming the construction on your suit is fairly good. Â If you bring them to local alteration tailors at dry cleaners, take 25% off those prices. (To other members: feel free to add what I have forgotten.) Altering the shoulder width can be done, but depends on the construction of the suit. Â The better the suit, the more likely it can be done without ruining the look of it. Â If your suit has thick shoulder padding (shoulders that rise up to your ears every time you move your arms up) but not fused, take the padding out, adjust the shoulder width, then put a new pad into it; however, expect about $50 to $80 for this job, and no guarantee that it will work as you wish, as it takes a combination of a dozen elements to make it work. Every off-the-rack suit needs some work. Â It will be lying to yourself if an off-the-rack suit is perfect. Â There are always the little things that can be refined, like the cuffs, button position, etc.. Â However, it is a matter whether you are willing to pay for only a half-inch alteration. Â My philosophy of late is that I would rather invest into refining my current wardrobe than heavily purchasing new ones. Â Half of them are already done, down to the smallest detail that I can think of. Â Every time when a jacket comes back from my tailor, it feels like a new jacket again. Hope this helps.