Off the Rack — Hung on hangers and purchased 'off the rack' these garments are 'One size fits all.' Only they don't, which is why the store's tailor can take in the pants, hem the pants, shorten the sleeves, Typically, most affordable, these suits are available only in the fabric and styles ordered by the store.
Made-to-Measure — Crafted from a basic pattern and modified based on a handful of measurements, these suits take time to be made. You will still try them on when they arrive to make final adjustments. More expensive than most 'off the rack' clothing, prices will vary based on the fabric chosen.
Custom — These garments are literally made for you. A clothier or tailor will take numerous measurements, upwards of 20 or 30, including the slope of your shoulders and back and will create a pattern from which your suit will be made. These suits will be more expensive than made-to-measure — with fabric, again, being the biggest driver.
Bespoke — These garments are made for you, or 'spoken, but with a higher level of expertise and more hand construction. These garments are infinitely more expensive, as the craftsmanship requires a very high level of skill and the attention of hand sewers the ultimate in real luxury. And yes, again, the fabric plays a big part of the investment