On newer posts I offer files in DXF (which can be used by GSD cutters), Silhouette Studio, SVG and PDF format for direct download.
Older posts have older formats and fewer choices. If you need another format (CDR, AI, etc.) or an updated file (Studio, for example) please email me (click "contact" tab under the blog header). I update older files by request.
Cricut users: helpful information on using my SVG files in Cricut Design Space