Numbers
Make large numbers and long numerals easier to read by splitting them up into chunks.
Long sequences of digits (e.g. numerals such as phone, serial and credit card numbers) can be difficult for users to read, remember and compare.
A simple and proven way to increase their readability is to split up the digits into visually separated groups:
5471 3250 0192 1718
Do
Credit card number with digits grouped
5471325001921718
Don't
Credit card number without digits grouped
The symbols for separating the digit groups vary based on tradition and cultural context. Make sure to follow the (local) conventions.
+1 (800) 322 8316
Do
Telephone number with digits grouped
18003228316
Don't
Telephone number without digits grouped