Sorry, I don't mean to nitpick, but the Espressif Dev-Kit boards are 2.5 * bigger than the TinyPICO (not 1 cm) and have no onboard battery management - something that most ESP32 users want - and no extra PSRAM. They also have no low current power paths so are terrible at deep sleep. But they are designed as reference boards, not as user facing project boards.

TinyPICO has 4MB Flash and 4MB extra PSRAM on top of the 520k SRAM plus the rest.