A tall blazer only earns its place if the proportions have actually been redrawn, not just lengthened at the hem. Sleeve length is the detail that separates a good one from a compromise: it should sit at the wrist bone, not halfway up the forearm, and the body needs enough extra length through the torso that the jacket closes without pulling at the button. Look at the shoulder line too. A blazer built properly for height will have a slightly longer shoulder seam and a deeper armhole, which is what stops the whole thing looking borrowed rather than made.
Fabric weight matters more than most people admit. A wool or wool blend with some structure holds its shape through a long day and drapes rather than creases at the elbow, while anything too soft collapses on a longer frame and starts to look like a dressing gown by mid afternoon.
Tailoring with a touch of stretch in the weave is worth seeking out for movement, but avoid anything with real spring in it, since that tends to be exactly what makes a tall blazer sag rather than hold its line.
Styling wise, the blazer works hardest when it is doing more than one job. Over tailored trousers with a heel, it reads as proper workwear without trying. Over a simple knit and straight leg denim, it becomes the piece that makes an otherwise plain outfit look intentional. Left unbuttoned over a slip dress, it takes on evening weight instantly, which makes it a genuinely useful bridge between a desk and dinner without a wardrobe change. Sleeves pushed slightly, worn open, with nothing underneath but a good t shirt, it earns its keep on the days that call for looking pulled together without looking like effort was involved.
Occasion wise, this is the piece for interviews, for travel days when structure photographs better than knitwear, for the client meeting that runs into drinks after, and for the kind of weekend where jeans need one grown up addition to work in a restaurant. What to avoid is anything boxy through the body in the name of length, since a tall blazer should still nod to a waist. Length without shape just reads as borrowed tailoring, and a good one should never look borrowed.
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