This page contains piano keyboard templates that can be downloaded for free and printed on an A4 sheet. Several variants of piano keyboards for solfeggio are available for download: one octave, two octaves, with and without inscriptions.
Piano keyboard one octave
Piano keyboard for two octaves A4 format
This sheet of A4 format can be printed and cut lengthwise into two parts. After that, you will get two piano keyboards for two octaves: one is clear, and the other is with note inscriptions.