# How do I know if clothes will fit when shopping online?

To know if clothes will fit when shopping online, measure your body once, compare those numbers to each brand's own size chart and the garment's measurements, and read reviews for notes like "runs small". Then check how the piece will look on you: nista, a free Chrome extension, lets you try clothes from any online store on an avatar made from a few photos of yourself, so you can judge length and proportion before you order.

## Key takeaways

- Your body measurements are more reliable than the size label you usually buy.
- Every brand has its own size chart; always use the one for that brand and product type.
- Garment measurements, such as length and inseam, tell you how the piece itself is cut.
- Reviews and fabric content help you decide between two sizes.
- nista shows clothes on an avatar with your real proportions; fit is very close, not exact.

## Step 1: Take your measurements

Use a soft tape measure, stand naturally, and wear thin, close-fitting clothes. Keep the tape snug but not tight, and write the numbers down somewhere you'll have them while shopping.

| What to measure | How to measure it | Most useful for |
|---|---|---|
| Chest / bust | Around the fullest part of your chest, tape level under your arms | Tops, dresses, jackets |
| Waist | Around your natural waist, usually the narrowest point above your belly button | Trousers, skirts, dresses |
| Hips | Around the fullest part of your hips and seat, feet together | Trousers, skirts, dresses |
| Inseam | From the crotch seam down the inside of your leg to where you want the hem | Trousers, jeans |
| Shoulder width | Across your back from one shoulder point to the other | Jackets, coats, shirts |
| Sleeve length | From the shoulder point, down a slightly bent arm, to your wrist | Shirts, jackets, knitwear |

A faster shortcut for length and inseam: lay a similar item you already own and like flat, and measure it. That gives you a real reference for how you like things to fit.

## Step 2: Use the brand's own size chart

Size labels aren't standardized, so a medium at one brand can be closer to a small or large at another. On every product page:

1. Open the size chart for that brand, and for that product category if they're split (tops vs. bottoms, denim vs. trousers).
2. Match your body measurements to the chart. If different measurements point to different sizes, prioritize the one that matters most for that garment, such as hips for trousers or shoulders for a jacket.
3. Note whether the chart lists **body** measurements or **garment** measurements. Garment measurements will be larger than your body, since clothes need ease to move in.

Jeans are one of the trickiest categories; see [how to find jeans that fit](/guides/how-to-find-jeans-that-fit) for a deeper walkthrough.

## Step 3: Read the product details and reviews

The product page often has clues the size chart doesn't:

- **Fit description:** words like "oversized", "relaxed", "slim", or "cropped" tell you how the piece is meant to sit.
- **Model info:** if the listing says what size the model is wearing and their height, compare it to yours.
- **Fabric:** stretch fabrics are more forgiving; rigid denim, linen, and woven cotton need a more exact size.
- **Reviews:** look for repeated notes like "runs small", "long in the sleeves", or "size up", especially from reviewers who share their size.

## Step 4: See how it looks on you

Measurements tell you whether something will close; they don't tell you whether a midi length hits where you want or how a boxy jacket sits on your shoulders. A virtual try-on fills that gap.

With nista, you make an avatar from a few photos of yourself and click "try it on" on any online clothing store, from [Zara](/stores/zara) to [SSENSE](/stores/ssense). nista says your avatar keeps your real proportions and describes its accuracy as "very close". Use it to judge length, proportion, and overall shape, and use the size chart to pick the number. Read more in [how accurate is nista](/nista/how-accurate-is-nista).

## Step 5: Decide, then check the return policy

If the chart, the reviews, and the try-on all agree, order the one size you need. Still glance at the store's return policy first, so you know your options if something doesn't work out. Following these steps consistently is one of the easiest ways to [reduce online clothing returns](/try-on/how-to-reduce-online-clothing-returns).

## Check the fit and the look before you buy

Measurements answer "will it fit?" and a try-on answers "will it look right on me?". Use both, and you'll order with far fewer surprises. [Make your nista avatar](https://nista.com).