I designed the title to print on 8.5" x 11" and the triangle posters to print on 11 x 17 card stock (affiliate link) so they can be seen from across the room.
If you don't have access to 11" x 17" paper, my husband showed me the other day that you can print the file to two 8.5" x 11" pages and tape them together. He did this with my grouping symbols poster, and it looked great!
I've uploaded the files here as an editable Publisher file and non-editable PDF file. For the Publisher file, you'll need to download the font Wellfleet or substitute your own favorite font. Downloading the PDF file will preserve the fonts and the formatting.