You are only purchasing the file in PDF format.
The file is already at the correct size. Print it in color and at “real size”. You can print it on a decal sheet or regular paper and affix with white glue. In the document, you will also find the pattern for the Recaro LS.
In the example image, you can see the pattern applied to a VW Golf MK2 from Fujimi with Recaro LS seats.