A4 vs. Letter Printing: The Difference in Millimetres
A4 is 210×297mm, US Letter is 216×279mm. We work out exactly what that 6mm/18mm gap does to a printed page, in millimetres and percent, for nine real handling-and-content combinations.
From the workshop
Printable Toolkit blog
Practical notes on getting printables right: printing at true size, picking letter heights and handwriting styles, and how each tool here is built and checked before it goes live.
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Dot Grid Spacing for Notebook Inserts: 5mm vs 0.2 Inch
A sourced table of real notebook dot spacings, the exact arithmetic behind 5mm vs 0.2in drift, and why dot size and dot darkness are two separate settings, not one.
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Fixed-Date Holidays: Why the Same Day Off Changes Every Year
A holiday tied to a fixed date lands on a different weekday every year. We compute what that actually does — bridge, long weekend, lost to the weekend, or stranded midweek — for six countries in 2027 and 2028.
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Why Cursive Needs More Line Space Than Print
Cursive descenders reach up to twice as deep as print ones. See measured font data and age-based letter heights so practice lines stop colliding.
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How a Puzzle Generator Proves Its Own Answers Are Correct
Sudoku, maze, crossword and word search generators can each go wrong in a different way. Here is exactly what our code checks before a puzzle is allowed to print.
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How Accurate Is a Printed Ring Sizer, Really?
A plain look at where paper ring-sizing error actually comes from, a sourced US/UK/EU conversion table, and when a printout is (and is not) good enough to buy on.
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Printer Margins: The Unprintable Area in Millimetres
Every printer refuses to ink a strip around the edge of the page. We size that strip from published spec sheets and calculate why it forces "fit to page" to shrink your document.
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Tian Zi Ge, Mi Zi Ge and Hui Gong Ge Compared
What each Chinese character practice grid actually trains, which one to start on, and why more guide lines is not automatically more help.
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How to Teach a Preschooler to Write Their Name
Learn how to teach your 3 to 5-year-old to write their name step-by-step and generate custom, printable name tracing worksheets for free.
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Why Most Printable Worksheets Fail and How to Fix It
Most PDF printables break when auto-resized by printers. Here is how our browser generator builds 100% accurate, privacy-safe worksheets.