So I'm trying to upload a PDF to Blurb.ca, and it only accepts the file if it's within the dimensions it requires (21x26 cm). I have my file set to 20x25 cm (which is the final booklet size) with a bleed of 0.5 cm up and down, and 1 cm on the inside and outside of the spread. But for whatever reason, the PDF is consistently exporting a bit more than that. Here's the feedback Blurb has given me:
Attached: cover.pdf (8.46 in x 10.43 in / 21.48 cm x 26.48 cm) research2.pdf (9.24 in x 10.82 in / 23.48 cm x 27.48 cm)
But the original sizes are: cover.pdf (20 x 25 cm single page, bleed of 0.5 cm all round) research.pdf (20 x 25 cm spreads, 0.5 cm up/down and 1 cm on the inside and outside)
I don't mind sending a file with a little more bleed, but it goes through the uploader, so it won't work unless it recognizes that exact file size. I did want to keep it in InDesign to keep the printers' marks and export it as an X-3 file, as the site requests. Any ideas as to why this is happening?