What Is a Crossword Grid? Sizes, Symmetry, and How Words Interlock
The grid is the black-and-white lattice that makes a crossword a crossword. Once you see how it is put together, building your own gets a lot less mysterious.
Paste your words and get an interlocking grid back.
Build a crossword gridThe anatomy of a grid
A crossword grid is a set of white squares for letters and black squares that separate the words. Entries run across (left to right) and down (top to bottom). A number sits in the first square of each entry, and that number ties the square to its clue in the across or down list.
How words interlock
Every answer has to cross at least one other answer by sharing a letter. That shared letter is the whole trick of a crossword: solve one word and you get a free letter in the word that crosses it. Words built from common letters interlock easily, while a word full of rare letters can be hard to connect.
How numbering works
Numbers are assigned by scanning the grid left to right, top to bottom. A square gets a number if it starts an across entry, a down entry, or both. That is why a single number can head both an across clue and a down clue — the entries share their first square.
You never number a grid by hand with a maker. Add or remove a word and the numbering redraws itself, which is one of the fiddliest parts of doing it manually and one of the easiest to get wrong.
Common grid sizes
- Small (about 8×8 to 11×11): kid-friendly, fits a handful of short words.
- Standard daily (15×15): the classic newspaper weekday size.
- Sunday-size (21×21): larger, with more long entries.
- Themed or classroom: whatever fits your word list on one page.
A word on symmetry
Published crosswords usually use rotational symmetry — the pattern of black squares looks the same if you turn the grid 180 degrees. It is a tradition, not a requirement. A classroom or party crossword does not need it; a grid that fits your words and prints cleanly is what matters.
Frequently asked questions
Do I need to design the grid myself?
No. Paste your words into the crossword grid maker and it arranges them into an interlocking grid and numbers the entries for you.
Why was a word left out of my grid?
Every word must cross another by sharing a letter. If one cannot connect, it is skipped and flagged. Swap it for a word that shares a letter with the rest of your list.
What size grid should a classroom crossword be?
Let the word list decide. Ten to twenty short-to-medium answers usually settle into a grid around 11×11 to 15×15, which prints readably on one page. The maker sizes the grid to your words, so you do not pick the dimensions yourself.
Why does one number sometimes have both an across and a down clue?
Because that square starts two entries at once — one running across and one running down. They share the first letter, so they share the number.