there is no size limit.

because ps is not a vector diagram, it is better to make it bigger. Generally, it is necessary to ensure the printing resolution of 3, that is, at least set the resolution to 3dp.i

and fill in the actual size of centimeters or millimeters as needed. The general logo is not too big. If you want to print a huge one, the resolution will be reduced accordingly. If the pixels remain the same, the centimeter size will become large enough.