This educational Music poster shows the circle of fifths along with a brief description of how it should be used. The poster is suitable for middle to senior school Science classes. Sizes The poster is supplied in two standard educational poster sizes: American paper size: 18 x 24 inches International paper size: A2 (42 x 59.4 cm) File Types We have supplied four zipped files, including two for 16 x 20 inches and two for A2 42 x 59.4 cm. The first of the two files is a high-resolution 300 dpi RGB colour jpeg. The second file is a high-resolution 300 dpi CYMK colour PDF. Why an RGB and a CYMK colour file? RGB jpeg files can be printed at places that print posters (Walgreens & Walmart (US), Officeworks, Big W, Harvey Norman (Australia), and Warehouse Stationery (NZ) even though they automatically convert them to a colour-compatible CYMK file. If you print your file through a printing company, they will probably want a print-ready, high-resolution 300 dpi CYMK PDF. Therefore, the second file has been converted to CYMK colour and includes all necessary printer’s marks. Returns Policy We are not able to accept returns for digital items. If you have a problem with your order, please let me know, and I will try my best to help.