Octagon black outline icon
Regular eight-sided octagon drawn as a thick outline with an empty center
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About the Octagon black outline icon
A single regular octagon is drawn in a thick even outline, its eight equal sides meeting at slightly softened corners around a completely empty interior. The blank center makes it a container as much as a shape, so it suits stop and warning signage, geometry and math teaching material, badge or achievement frames, flowchart and diagram building blocks, and placeholder shapes in wireframes.
The figure fills the canvas almost edge to edge with uniform stroke weight and no fill, keeping the eight-sided silhouette immediately readable. It pairs with hexagon, pentagon and triangle icons from the same geometry set. Drop a number or glyph inside it to turn the shape into a labeled marker.
This is the black outline version of the octagon icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
