How big where the crystal radios?

Crystal radiOS were typically small and portable, often fitting in a box or cabinet that could be about the size of a shoebox or slightly larger. The components, including the crystal detector, coil, and tuning capacitor, were compact, allowing for easy assembly and use. Many early crystal radiOS were designed to be easily assembled by hobbyists, so their size and design could vary significantly based on individual preferences and available materials. Overall, they were designed for simplicity and accessibility rather than for large-scale use.