Ecom Almanac is a working reference desk for online sellers: currency and country codes, image sizes, fee math and pre-launch checklists — in tables you can bookmark and trust.
All reference pages are dated and revised on a fixed schedule.
Merchants search for a single hard cap on variants and staff accounts when the real limits sit inside plan pricing and theme section code, and this reference lines up what is actually documented against what the market's theme code shows.
The usual advice to just upload a big photo and let Shopify handle it misreads what the Theme Store actually requires and what theme code actually does with an image once it lands in a section.
Merchants search for country-by-country gateway lists but the actual limits sit inside theme code and Shopify's plan tiers, which is where this piece looks instead of inventing regional rules that were never measured.
The standard flat-rate packaging of the three US carriers in one place: USPS Flat Rate box dimensions inside and out, UPS Simple Rate cubic-inch tiers, FedEx One Rate packaging, plus a calculator that tells you which tier your box falls into.
The dated reference for planning a store's promo year: Q4 2026 from Halloween to Boxing Day, then the full 2027 season through Cyber Monday. Sortable table, days-away countdown, every date verified against a calendar source.
A 45-point SEO checklist for an online store, built only from Google Search Central documentation and the Shopify manual. Every point cites the page it came from, and you can tick items off as you work.
Standard UTC offsets from UTC-12 to UTC+14 with example cities, plus which markets move their clocks for daylight saving and which stay fixed.
Women's and men's size conversion in one place: US, UK and EU numbers next to the actual bust, waist, hip and chest measurements in cm and inches, plus the reason the EU number is never quite the same twice.
All 183 two-letter ISO 639-1 language codes in one table, for hreflang tags, store translations, product feeds and Accept-Language headers.
What GTIN, UPC and EAN actually mean, how many digits each has, which barcode carries them, and where retail POS ends and case logistics begins.
Standard shipping label dimensions in inches and millimeters, the carriers and printers that use each, and why 4 by 6 is the one to buy.
Margin and markup are not the same number. This page explains the difference, gives a conversion table and an interactive calculator you can run with your own cost and price.
A working pre-launch checklist for a new online store: storefront, legal pages, payments, shipping, SEO basics, analytics and the tests to run before you announce anything.
What a store pays per order on each Shopify plan: subscription rates, processing formulas and an interactive calculator you can run with your own numbers.
The official Shopify limits for product photos, video and 3D models in one table: maximum pixels, file sizes and formats, straight from the Shopify Help Center.
The image dimensions a store actually posts in one table: feed posts, Reels, Stories, pins and link previews, checked against each platform's official documentation.
Every active ISO 4217 currency in one table: alphabetic code, numeric code and currency name, for checkout settings, product feeds and payment APIs.