Single speed strobe discs are available for 16rpm, 33.33rpm, 45rpm and 78rpm.
Single speed strobe discs are available in 100mm diameter on a single sheet of A4 paper for 50Hz discs or a single sheet of American letter paper for 60Hz discs.
The larger 7" versions are sized to be printed each on their own sheet of A4 (in the case of the 50Hz discs) or American letter paper (in the case of 60Hz discs).
download the 100mm 50Hz versions here
download the 7" 50Hz versions here
download the 100mm 60Hz versions here
download the 7" 60Hz versions here