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Business Card Text Design - Fitting Information into 91x55mm
A standard Japanese business card measures 91mm by 55mm. Within that 50 square centimeters of space, you must fit a name, title, company, address, phone number, email, and possibly a URL and QR code - all while maintaining readability and visual balance. A fully loaded card runs to a few hundred characters of text, and every character competes for space with every other character. Business card design is one of the purest exercises in text constraint optimization: the physical dimensions are fixed, the information requirements are non-negotiable, and the margin for error is measured in millimeters.
Business Card Sizes by Region
Business card dimensions vary by country, and the size difference directly affects how much text you can include. There is no international standard that defines the size of a business card: each of the figures below is a commercial custom that settled into place locally. The card standard that does exist is ISO/IEC 7810 ID-1 (85.60mm x 53.98mm), the credit card format, and it was never written for business cards. The 85mm x 55mm card used across Western Europe sits close to it because cards of that shape are easy to keep together in a wallet or card file.
| Region | Customary size (mm) | Area (cm2) | Relative to Japan |
|---|---|---|---|
| Japan | 91 x 55 | 50.05 | Baseline |
| US / Canada | 88.9 x 50.8 (3.5" x 2") | 45.16 | 10% smaller |
| Western Europe (UK, Germany, France and others) | 85 x 55 | 46.75 | 7% smaller |
| China | 90 x 54 | 48.60 | 3% smaller |
| South Korea | 90 x 50 | 45.00 | 10% smaller |
Japan's 91x55mm card is the largest of these customary formats, which is fortunate because Japanese business cards commonly carry more information than Western ones. A Japanese card often includes both Japanese and romanized text (meishi with bilingual layout), effectively doubling the text content. The US card is about 10% smaller by area, and nearly all of that difference is vertical: 4.2mm of height against only 2.1mm of width. Height is what bites, because card text is stacked as horizontal lines. At the 2.8mm line pitch that 8pt type needs (see the readability table below), 4.2mm is roughly a line and a half - a department name, or the white space that keeps the remaining lines legible at the same font size.
European cards at 85x55mm share the same height as Japanese cards but are 6mm narrower. This width reduction disproportionately affects horizontal text layout, forcing either smaller font sizes or shorter text strings. A company name that fits comfortably on a Japanese card may need abbreviation on a European card. The ISO/IEC 7810 ID-1 credit card format (85.6mm x 53.98mm) is close to this shape but about 1mm shorter, and because it is a standard for cards in general rather than for business cards, a card cut to it is a deliberate choice rather than a regional norm.
Text Elements and Character Budgets
Each element on a business card has a practical character limit determined by font size, readability, and layout conventions.
| Element | Typical chars | Min font size | Priority |
|---|---|---|---|
| Name (primary) | 10-25 chars | 10-14pt | Highest - must be instantly readable |
| Name (romanized) | 15-30 chars | 7-9pt | High on bilingual cards |
| Job title | 15-40 chars | 7-9pt | High - establishes role context |
| Company name | 10-40 chars | 8-10pt | High - brand recognition |
| Department | 10-30 chars | 6-8pt | Medium - often abbreviated |
| Address | 40-80 chars | 6-7pt | Medium - shrinking in importance |
| Phone | 12-18 chars | 7-8pt | Medium |
| 20-40 chars | 7-8pt | High - primary contact method | |
| URL | 15-40 chars | 6-8pt | Low-Medium - often replaced by QR |
| QR code | N/A (visual) | 15x15mm min | Rising - replaces URL and vCard |
Adding up the figures above gives about 150 characters when every element is kept short and more than 340 when all of them run long, and a bilingual Japanese-English card passes 400 because most elements are set twice. The count that decides the layout, though, is not the total but the per-element count at a readable size, and the number of lines those elements need. A name at 12pt takes about twice the vertical space of an address line at 6pt, so the visual weight of each element is not proportional to its character count.
There is no single point size at which print stops being readable. The same 6pt text behaves differently on smooth stock printed in a dark ink than on paper that lets the ink spread or in a light grey; Japanese type is denser than Latin type at the same size, so the kanji with the most strokes fill in first; and the age of the person you hand the card to, plus the light in the room where they read it, moves the threshold too. What is fixed is the geometry. On a 91mm card with 5mm margins on each side the printable width is 81mm, and at 6pt that line holds roughly 70 characters of Latin sans-serif text (see the table below). Full-width Japanese characters are a separate calculation: each one occupies its full em, about 2.1mm at 6pt, so the same 81mm holds only about 38 of them. A 40 to 60 character Japanese address will therefore not fit on one line at 6pt, whatever the Latin figure suggests, while a 35 character email address and a phone number can share that line - at a size where many readers will simply give up on both. Text shrunk past what your reader can resolve is not information on the card; it is information you left off.
QR Codes as Text Reduction Strategy
QR codes on business cards serve a dual purpose: they provide a scannable digital contact exchange and they reduce the amount of printed text needed on the card.
| QR content type | Data size | Text it replaces | Character savings |
|---|---|---|---|
| URL only | ~30-60 bytes | Printed URL | 15-40 chars |
| vCard (basic) | ~200-400 bytes | Name, phone, email | 50-80 chars |
| vCard (full) | ~400-800 bytes | All contact info + address | 100-200 chars |
| LinkedIn profile URL | ~40-50 bytes | LinkedIn URL text | 30-45 chars |
| Digital business card service | ~30-50 bytes | Multiple URLs and social links | 60-120 chars |
A full vCard QR code can replace 100-200 characters of printed text - the address, phone number, email, and URL - with a single 15x15mm square. The gain is real, but it is smaller than "four lines removed" makes it sound, because the square itself has to go somewhere: 15 x 15mm is about 6% of the 81 x 45mm printable area, and its 15mm height is about five 8pt lines if it is stacked above or below the text rather than set beside it. Whatever is left over can go to larger font sizes, more white space, or additional information like social media handles. The code also needs roughly that 15x15mm to scan reliably, and not everyone will scan it. For a deeper look at QR code data capacity and how text length affects code complexity, see QR Code Data Capacity.
The pitfall is that anything you move into the code becomes information that only reaches people through a phone. The person who wants to write your number down while you are still talking, the office where camera use is restricted, the person who pulls your card out of a card file weeks later: none of them get it. A workable split is to keep the phone number and the main address printed on the card and move the URL and social accounts into the code.
The data size of the QR code directly affects its visual complexity. A URL-only QR code (~40 bytes) produces a simple, easily scannable pattern. A full vCard with address and notes (~600 bytes) produces a dense, complex pattern that requires a larger physical size to scan reliably. At 15x15mm, a complex vCard QR code may fail to scan under poor lighting or with older phone cameras. The practical recommendation is to encode a URL pointing to a digital business card service rather than embedding all contact data directly in the QR code.
Font Size and Readability Thresholds
The relationship between font size, character count per line, and readability determines the fundamental layout constraints of a business card.
| Font size (pt) | Chars per line (81mm width) | Readability | Typical use |
|---|---|---|---|
| 14pt | ~30 chars | Excellent - readable at arm's length | Name (primary) |
| 12pt | ~35 chars | Very good | Name, company name |
| 10pt | ~42 chars | Good - comfortable reading distance | Title, company name |
| 8pt | ~52 chars | Adequate - requires close viewing | Contact details, department |
| 7pt | ~60 chars | Minimum for most readers | Address, secondary info |
| 6pt | ~70 chars | Difficult - fine print territory | Legal text, disclaimers |
| 5pt | ~84 chars | Unreadable for many people | Not recommended |
The 81mm printable width (91mm card minus 5mm margins on each side) is the hard constraint. At 8pt - the most common size for contact details - you get approximately 52 characters per line. An email address like "firstname.lastname@longcompanyname.co.jp" is 42 characters, leaving only 10 characters of breathing room on the line. If the email is longer, you must either reduce the font size (hurting readability) or move it to its own line (consuming vertical space).
For bilingual cards, the vertical space constraint is even tighter. A card with Japanese text on the front and English on the back doubles the available space, but a card with both languages on one side must fit everything into 55mm of height (minus margins). With 5mm top and bottom margins, you have 45mm of usable height. At 8pt (roughly 2.8mm per line with leading), that is approximately 16 lines. A bilingual card with name, title, company, department, address, phone, email, and URL in both languages needs 14-16 lines minimum, leaving almost no room for white space. For more on how LinkedIn profiles handle similar text constraints digitally, see LinkedIn Profile Tips.
Design Decisions That Reduce Character Count
When text exceeds the available space, designers use specific techniques to reduce character count without losing essential information.
| Technique | Example | Chars saved |
|---|---|---|
| Abbreviate department | "R&D Dept." instead of "Research and Development Department" | ~35 chars |
| Drop "http://" from URL | "example.com" instead of "https://www.example.com" | ~12 chars |
| Use icons for phone/email | Phone icon instead of "TEL:" label | 4-6 chars per item |
| Abbreviate address | Drop building floor if in QR vCard | 10-20 chars |
| Use QR for full contact | Replace URL + social links with QR | 40-80 chars |
| Single-language layout | One language per side on double-sided card | Halves per-side text |
The most effective single technique is moving to a double-sided bilingual layout. Splitting Japanese and English onto separate sides immediately halves the text density per side, allowing larger fonts and more white space. The second most effective technique is replacing the printed URL with a QR code, which saves 15-40 characters and provides a better user experience (scanning is faster than typing a URL).
Icon-based labels (a phone icon instead of "TEL:", an envelope icon instead of "Email:") save 4-6 characters per contact line. On a card with four contact methods, that is 16-24 characters saved - enough to increase the font size by one point or add meaningful white space between elements. These small optimizations compound: applied together, the techniques in the table above account for roughly 110 to 170 characters, a large share of a card that started somewhere between 150 and 340.