Yes, we can fit any length on any size. What will be effected is the compression of the sound waves. The larger the size, the more detail will be visible. Most songs look great as a whole but if you want to highlight a certain lyric, we can edit the song to only include that section. If you're not sure about your selection, please request a preview and know that we can make adjustments if you are not happy with the shape of the waveform.