How Big Should the TM Symbol Be on a Logo?

The short answer

In the US, no law or trademark office rule sets a required size for the TM symbol. The size is a design decision. Make the symbol small enough that it never competes with the logo, but large enough to stay readable wherever the logo appears. In practice that usually means setting it noticeably smaller than the logo's lettering and placing it as a superscript near the upper right of the wordmark or symbol. The final check is legibility at the smallest size the logo will actually be used.

No confirmed measurements were found for this guide, so it gives no fixed percentages, point sizes or ratios. Any specific figure you see elsewhere is a style preference, not a documented requirement. Treat it that way unless it comes from your own brand guidelines or legal counsel.

Terms you need

• TM (™): an unregistered trademark notice. It signals that you claim the mark as a trademark. It does not require registration.
• Superscript: a character set smaller than the surrounding text and raised above the baseline. The baseline is the line that letters sit on.
• Cap height: the height of the capital letters in a typeface. It is a common reference point for judging how large and how high the symbol sits.
• Optical size: how big something looks to the eye, as opposed to its measured dimensions. Small symbols often need adjusting so they look right.
• Minimum size: the smallest size at which a logo is approved for use. The TM must still be readable at that size.
• Compact or symbol variant: a reduced version of a logo, such as an icon or monogram, used where space is tight.

What is documented and what is a design recommendation

Documented: the TM symbol has no statutory size, weight or position requirement in the US. The ® symbol is different. It may only be used for marks registered with the US Patent and Trademark Office, and using it on an unregistered mark can create legal problems. Even for ®, the law does not specify a size.

Design recommendations: keep the symbol subordinate to the mark, make it readable, place it consistently and record its size in the brand guidelines. These are conventions, not rules. Whether you need the notice on a particular piece of artwork, or should switch from TM to ®, is a legal question to confirm with a trademark attorney.

Step by step: sizing TM in vector artwork

• 1. Confirm which notice applies. Use TM for an unregistered mark and ® only after registration. Check this before you finalize the artwork.
• 2. Choose what the symbol attaches to. This is usually the end of the wordmark or the top right of the primary symbol. Use the same anchor in every lockup.
• 3. Choose a source glyph. Take the ™ character from the logo typeface, or from a typeface that matches its weight. Set it as live text first so you can resize it easily.
• 4. Size it against the cap height. Start well below the cap height and adjust by eye until the symbol is clearly secondary but still legible. No fixed ratio is documented, so the size you settle on becomes your brand's own spec.
• 5. Correct the weight. A small glyph can look too thin next to bold lettering, or too heavy next to light lettering. Adjust it, or pick a different weight, so it looks consistent with the logo.
• 6. Set position and spacing. Align the top of the symbol with the top of the cap height or the symbol, or slightly above it. Leave a consistent gap so it does not touch or crowd the mark.
• 7. Convert to outlines in the delivery files. Outlining turns live text into vector paths, so the artwork no longer depends on installed fonts. Keep an editable master that still contains the live text.
• 8. Group or lock the symbol with the logo. This keeps it from drifting or scaling separately when someone places the artwork.

Compact and symbol variants

Scaling the full logo's TM down proportionally often fails on small variants, because the symbol becomes unreadable before the rest of the logo does. There are two common approaches. One is to enlarge the TM slightly in the compact version so it survives at small sizes. The other is to leave the TM off variants used below a set size. Whether you can omit it is partly a legal question, so record the decision in the brand guidelines instead of letting it vary from file to file.

How to verify the result

• View the logo at its approved minimum size on screen, and print it at that size if it will be printed. Check that you can still read the symbol.
• Zoom out or step back from the screen. The TM should not be the first thing you notice.
• Check the reversed version, such as white on a dark background, where thin strokes can fill in or disappear.
• Inspect the delivered vector file. The symbol should be outlined paths, grouped with the logo, with no stray live text. A .svg, .eps, .ai or .pdf extension alone does not prove a file contains only vectors.
• Confirm that the size and position match across all lockups and variants, and record the final spec in the brand guidelines.

Gaps in this guidance

No subject-specific evidence was available for this guide, such as measured ratios, published standards or a style guide that requires a particular size. For that reason it gives a method rather than numbers. If your organization, a client or a licensing agreement sets a TM size or placement, that requirement takes precedence over the general approach described here.