The Sizely Blog

Sizing and fit, explained

Guides on how to measure yourself, read a brand's size chart, and convert sizes between brands and countries, so you order the right size the first time.

Guides

How to Measure Glasses?

The eye size is the most important number for fit. Read the three numbers stamped on the arm, or confirm them with a millimeter ruler in about two minutes.

Alize Mendez

Alize Mendez

June 13, 2026

Guides

How to Measure a Jacket?

A guide to measuring jackets and blazers flat for online listings: nine flat measurements in inches and centimeters, a size-tag table cross-checked against ASTM D6240 and ISO 8559-1, fit notes, common mistakes, and FAQs.

Alize Mendez

Alize Mendez

June 13, 2026

Guides

How to Measure a Dress Shirt?

A plain guide to measuring a dress shirt the right way, reading the neck and sleeve numbers on the tag, and knowing which measurement controls which part of the fit.

Nella Cheng

Nella Cheng

June 13, 2026

Selling Tips

How to Block a Buyer on eBay

Block a problem buyer on eBay in four steps, then set buyer requirements so you rarely have to. Includes a threshold-setting framework and how clearer listings cut the fit returns that create problem buyers.

Sophie Clipton

Sophie Clipton

June 13, 2026

Buying Tips

How to Cancel Your eBay Order as a Buyer

A buyer's guide to canceling an eBay order: the one-hour self-service window, requesting a seller cancellation after it closes, refund timing, and the return path once an item ships, with each policy claim cited to eBay's official help pages.

Jason

Jason

June 13, 2026

Guides

How to Measure a Belt?

Measure a belt by running a tape from the buckle fold to the hole you fasten most. To buy new, add 1 to 2 inches to your pants waist.

Annie Button

Annie Button

June 13, 2026

Guides

How to Measure a Bikini?

Measure a bikini in five laid-flat readings: cup length, cup width and band on the top, waist width and front-to-back rise on the bottom. List the relaxed flat numbers, not body size, so shoppers compare against the garment.

Nella Cheng

Nella Cheng

June 13, 2026

Guides

How to Measure a Bodysuit?

A hands-on guide to measuring a bodysuit flat, with the six points that matter, measured flat ranges by size, a thong vs full-cut leg diagram, and a fit-notes FAQ.

Alize Mendez

Alize Mendez

June 13, 2026

Guides

How to Measure a Dress?

A guide to measuring a dress flat, point by point, with a worked example, an inline flat-to-body conversion calculator, and ASTM-aligned definitions. Reviewed June 2026.

Alize Mendez

Alize Mendez

June 13, 2026

Guides

How to Measure a Hat?

Measure a hat with three numbers, the inside circumference that sets the size plus crown height and brim width, with a circumference-to-size chart and step-by-step instructions.

Nella Cheng

Nella Cheng

June 13, 2026

Guides

How to Measure a Polo Shirt?

A flat-measurement guide to a polo shirt's chest, shoulder, sleeve, length, waist and hem in inches and centimeters, with fabric, fit and common-mistake notes.

Sophie Clipton

Sophie Clipton

June 13, 2026

Guides

How to Measure a Skirt?

A step-by-step guide to measuring a skirt flat: waist, hip, length, and hem sweep, plus which numbers to double and the most common listing mistakes.

Alize Mendez

Alize Mendez

June 13, 2026

Guides

How to Measure a Sweatshirt?

A step-by-step guide to measuring a sweatshirt flat (chest, length, shoulder, sleeve, cuff, hem and neck) in both inches and centimeters for accurate listings.

Alize Mendez

Alize Mendez

June 13, 2026

Guides

How to Measure a Swimsuit?

A step-by-step guide to measuring a swimsuit flat: the five key measurements, how to read the tag, and the mistakes that cause returns.

Sophie Clipton

Sophie Clipton

June 13, 2026

Guides

How to Measure a T-Shirt?

A flat-measurement guide to a t-shirt's chest, length, shoulder, sleeve and hem, with a size table and the common mistakes that throw numbers off.

Nella Cheng

Nella Cheng

June 13, 2026

Guides

How to Measure Jeans?

A step-by-step guide to measuring jeans flat across eight points, with doubled inch and cm readings, a numbered diagram, brand size-chart references.

Nella Cheng

Nella Cheng

June 13, 2026

Guides

How to Measure Shorts?

A practical guide to measuring shorts flat across seven points, with a tag-equivalence table backed by ISO and ASTM body-measurement standards.

Alize Mendez

Alize Mendez

June 13, 2026

Selling Tips

How to Send an Invoice on eBay

A 2026 walkthrough of sending eBay invoices from Seller Hub, with combined shipping, managed-payments payout timing, and troubleshooting, sourced from eBay's help pages.

Jason

Jason

June 13, 2026

Guides

The Complete Guide to Selling on Poshmark: Tips and Tricks for Success

A workflow for Poshmark in 2026: how fees work, how to set up listings, the flat measurements that reduce returns, what sells fastest, and how to run a closet like a business. Includes a measurement diagram, a measurement-rich vs tagless comparison, and cited Poshmark fee and policy sources.

Alize Mendez

Alize Mendez

June 13, 2026