A work wardrobe has to do a lot: look professional, survive a full day, handle commuting and last for years. The cheapest way to build one is to buy fewer, better-fitting pieces and avoid alterations where you can. That starts with knowing your own measurements and what each kind of garment needs from them.
Collect your numbers
Measure bust or chest, waist, hips, shoulders, inseam and height, and keep them in your phone. A tool like the Body Shape Calculator can show how your bust, waist and hips compare, which helps you see which garments tend to need adjusting. Update your measurements every few months.
Blazers and jackets
A jacket must fit across the shoulders first, because the shoulder seam cannot be altered easily. The sleeve length and waist suppression can be adjusted by a tailor. Check that you can button the jacket without pulling across the chest or waist and that you can move your arms. If you fall between sizes, choose the one that fits the shoulders.
Trousers
Trousers are sized by waist and often by hip, and the waistband can usually be taken in or out by a small amount. The length is easily shortened but not extended, so check the hem allowance. Look for a flat front and a smooth fit across the hips and seat, and sit down in the fitting room to check comfort. If you are between sizes, buy the larger one and have the waist adjusted.
Dresses and skirts
Wrap dresses and styles with stretch are adaptable. Sheath and tailored dresses fit best when the bust, waist and hips fit close to the garment. Shoulders and bust are the hardest to alter, so use those as your fitting priorities. Hems and straps are quick fixes.
Shirts and blouses
The key fitting points are shoulders, chest and sleeve length. Watch for gaps between buttons across the bust, which suggests the garment is too small at that point, or a wrinkled pull on the back if the shoulder width is wrong.
Build a capsule
Start with neutral colours and a small number of pieces that mix together: two jackets, three pairs of trousers or skirts, five tops and two dresses. Add a few accessories for variety. Keep the quality high for items you will wear often, and economise on trend-led pieces.
Understand fabric
Wool blends and dense cotton hold their shape and resist creasing better than thin synthetic fabrics. Check the care label to see whether you will need dry cleaning. Lining helps a garment hang well.
Using a tailor
A good tailor is a valuable investment. Typical jobs include shortening hems, taking in waists and narrowing sleeves. Set a budget for alterations and check that the total cost is reasonable compared with buying the next size or a different brand.
Buying online
Compare your measurements with the garment measurements listed on the product page, not just the size label. Check return policies and try the items on at home with the shoes you would wear to work.
An example wardrobe check
Pick your five most worn work garments and note what you like and dislike about how each fits. Perhaps the blazer is perfect across the shoulders but tight at the waist, or the trousers fit the hips but gape at the back. Patterns emerge: you may always need waist adjustments, or always need to shorten sleeves. Tell the tailor about these patterns when you buy, and use them to prioritise when you shop, for example by choosing brands that cut generously in the area where you usually need more room.
Summary
Know your measurements, prioritise shoulders and chest on jackets, allow for waist alterations on trousers, choose versatile colours and fabrics and use a tailor for finishing. You will end up with clothes that fit and last.