HubSpot's CTA tool gives users two options when determining what size a specific CTA should be: automatic and fixed. If a CTA is configured to use fixed dimensions the button's background will be exactly sized to those dimensions. In cases where the text area contains text that exceeds those dimensions (either by length or size) the CTA background is unable to adjust to fit and the text will appear to run over. This can be avoided by reducing the size of the text on the CTA or by removing the fixed dimensions.
Last updated: October 6, 2015