How to Find Someone's Clothing Size
(Without Spoiling the Surprise) 🎁

Buying clothes for someone you love is a beautiful idea — right up until you're standing in the store with no idea whether they're a medium or a large, and the gift receipt already feels like an admission of failure.

You're not alone. According to industry estimates, roughly one in three clothing gifts gets returned, and size is the number one reason. But it doesn't have to be this way. There are smart, sneaky, and surprisingly straightforward ways to find out someone's clothing size without asking them directly — and without ruining the surprise.

Method 1: Check Their Wardrobe (The Classic)

This is the most reliable method if you have access to their home. Clothes that fit them well will have the answer printed right on the label. Look for:

• Tops and t-shirts: Usually XS, S, M, L, XL — but always check the brand, as sizing varies significantly.
• Jeans and trousers: Look for the waist and inseam measurements (e.g., "32×30") or numeric sizes.
• Shoes: Check the inside of an existing pair.
• Dresses: Often sized 0–18 in US sizing or 6–22 in UK sizing.

While you're at it, note the brand. A person who is a "medium" in one brand might be a "large" in another — so knowing they consistently buy from a particular retailer is invaluable context.

Method 2: Ask a Mutual Friend or Family Member

If you have a mutual contact who knows the person well, this is your shortcut. A sibling or long-time friend is far more likely to know their sizing — and is often flattered to be asked. The key is to frame it right:

"I want to get [Name] something nice to wear for [occasion] — do you happen to know what size they are?"

This works particularly well within families, where parents often know their adult children's sizes, or where a spouse or partner has been asked the same question before.

Method 3: Use a Size Notes Profile (The Modern Way)

This is where technology comes in. Size Notes is a free app that lets people save their clothing measurements in one place and share them as a QR code or a link.

Here's how the gifting flow works:

1. You ask the person — once — to set up their Size Notes profile. Frame it as: "I want to get you nice things, but I never know your size. Can you fill this in?"
2. They enter their measurements in the app: tops, bottoms, shoes, ring size, everything.
3. They share their profile with you via QR code. You scan it, and their sizes are saved to your phone.
4. Before any future purchase — birthday, Christmas, anniversary — you open the app and their sizes are right there.

The beauty of this method is that it works across the whole family. A parent can share their profile with all their adult children. A partner can share theirs with you. You ask once and never have to guess again.

Method 4: Guess Smart with Size Charts

If you know someone's rough body measurements — even from a casual conversation about fitness — you can use these to estimate their size. General guidelines for women's US clothing sizes:

Keep in mind these are approximate — sizing varies significantly between brands and countries. For a deeper dive, see our complete size chart guide.

Method 5: Buy the "Safe" Size — and Include the Receipt

When all else fails, size up, not down. Clothes that are slightly too big can often be worn; clothes that are too small are unwearable and embarrassing. Choose a size larger than you think they need, attach a thoughtful note, and include a gift receipt or tell them the shop you bought from.

Most people appreciate the effort far more than they mind the trip to exchange.

The Bottom Line

The best long-term solution is to know — not guess — the sizes of the people you buy for. Whether you use the wardrobe-check method for a one-off purchase, or set up Size Notes to store everyone's sizes once and for all, you'll save time, money, and the awkward conversation of a returned gift.