I am not the above poster, but I have a semi-reliable tailor in Southeast Asia. They took my measurements a few years ago when I visited their country, and I send them size updates when needed. They have excellent fabrics in a variety of colors and weights.
I have seen that there are pros and cons (with this particular tailor, others shops can be more professional, but they are also more expensive, sometimes much more).
Pros: hard-to-beat price ($35 for a classic or sporty cotton shirt, $60 for wool/cashmere/denim/cotton pants, $150 for a wool or cotton sport coat, $200-250 for a suit) for something that is somewhere between bespoke and made-to-measure, opportunity for low-cost explorations (let's say I have a few unique garments), playing with details and fabrics.
Cons: communication is often challenging (most speak broken English, which demands a good deal of patience and intuition), they are not very detail-oriented (some of the uniqueness of the garments were not sought by me, e.g., e.g., bizarre button placement or pocket shape, etc.), quality of garments can vary unpredictably, and they are always asking for more business, which can be tiring.
The other option is to buy on eBay, as I have been doing for some time. Although most pieces are priced correctly, some are much cheaper than they should be. I have bought fantastic, semi-current suits (say, suits that are 10 years old, but with classic features, meaning they are relatively "timeless") that have been used sporadically (the color of the ink on the label is a tell, some have been used once or twice) for $150 when new they would have cost 10 or 15 times that.
But I get much more satisfaction when I order clothes from my tailor. Those are pieces "designed by me", for me.