A live, editable C monogram you can download as SVG or PNG right now — plus what the shape of a C actually demands from a logo designer.
An open circle — an O with roughly a quarter removed, with two terminals facing right.
Rendered in Montserrat at weight 700. Drag the letter to reposition it, then download — or open it in the full editor to change everything.
Everything about the C hinges on its aperture: the gap between the upper and lower terminals. Too closed and it becomes an O; too open and it becomes a bracket. The C also has no vertical stem, so it carries less ink than almost any other capital, which makes it look lighter than its neighbours at the same weight. And because it is a curve, it overshoots the cap-height and baseline slightly in any well-drawn face.
Choose a face with a genuinely open aperture — humanist faces like Open Sans and Cabin cut their terminals at an angle, which reads as open, while strict geometric faces cut them vertically and close up faster. Go one weight heavier than you would for a stem-based letter to compensate for the missing vertical mass. In a circular container, a C nests beautifully; in a hard square, leave more padding than you think.
The C survives small sizes better than most curved capitals, provided the aperture stays open. Watch for the aperture closing under antialiasing at 16px — if it does, the icon reads as an O and the whole mark changes meaning.
CA and CO are common in company initials. CO is genuinely difficult because two round shapes in sequence create an ambiguous rhythm; negative tracking helps the pair read as a unit. The C nests well against a following A — the A's left diagonal slots into the C's open side.
Montserrat's wide, circular geometry gives the C a large, confident aperture and fills a square container without looking stretched. See what Montserrat looks like as an icon , or swap it for any of the 900+ Google Fonts in the editor.
Geometric centring and optical centring are not the same thing. Nudge the C until it looks centred, not until the numbers say it is.
Corner radius changes the mood more than the font does. A 0% square reads as technical, 20% as an app icon, 50% as a personal avatar.
The editor's Web Icons export produces ten PNG sizes, an SVG, a favicon.ico, a manifest and the HTML to install it all.
Open the free editor, change the font, colours, corner radius and spacing, then export SVG, PNG, ICO or a complete favicon package. No account, no watermark.
Open the letter C logo editorEach letter has its own shape problems. These are the nearest neighbours of the C.