Sizely publishes practical guides on sizing, fit, and measuring. Our articles explain how to measure yourself, read a brand's size chart, and convert sizes between countries so you order the right size the first time.
Browse our latest guides on sizing and fit below. Have feedback, or a topic you want us to cover? Tell us.
Alize brings a deep understanding of the complexities of apparel sizing and has been instrumental in developing innovative measuring techniques that are at the heart of Sizely's technology. With over 5 years of experience as an online seller, her insights into clothing measurements have helped countless e-commerce businesses minimize returns and enhance customer satisfaction.
A cross-country glossary of clothing fit terms. See how slim, regular, relaxed and oversized translate (and shift meaning) across 10 markets, with a reference table and the measurements that make fit universal.
Alize Mendez
June 15, 2026
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
June 13, 2026
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
June 13, 2026
20 practical tips for selling clothes online across eBay, Poshmark, and Mercari, with a flat-measurement table and cited sources.
Alize Mendez
June 13, 2026
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
June 13, 2026
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
June 13, 2026
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
June 13, 2026
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
June 13, 2026
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
June 13, 2026
A step-by-step 2026 guide to eBay's Time Away (vacation mode): where to find it, whether to pause or allow sales, what keeps running, and how to return.
Alize Mendez
June 13, 2026
Poshmark and Mercari both charge a 10% to 20% seller fee in the U.S. as of 2026. A side-by-side breakdown of the real fee math, shipping ($6.49 on Poshmark via USPS Ground Advantage vs Mercari's carrier labels), audience fit, and which platform to choose, with every figure tied to a dated primary source.
Alize Mendez
June 13, 2026
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
June 13, 2026
A practical guide to selling vintage clothing online: sourcing, dating pieces, measuring, photographing, choosing platforms, and cutting fit-related returns.
Alize Mendez
June 13, 2026
The average men's ring size is a US 9 to 10, about 59.5 to 62.1 mm around the finger. Here is the full size chart, a printable sizer diagram, and a step-by-step at-home method to measure your ring size without a jeweler.
Alize Mendez
June 13, 2026
