But the 0.1" pins are on a 0.1" grid (so 2.54mm). The distance between them is 5x0.1" = 12.7mm - you could fit a 4x0.1" pin strip exactly in the gap between the two rows of pins.
Same with the 0.05" pins, they're on a 0.05" grid, so 1.27mm - and they're in line with the last 0.1" pin in the row
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Is the board designer using Eagle CAD? If so there's actually a selection of footprints available at: https://github.com/espruino/EspruinoBoard/tree/master/Pico/Component
(he might even be able to import the library)
But the 0.1" pins are on a 0.1" grid (so 2.54mm). The distance between them is 5x0.1" = 12.7mm - you could fit a 4x0.1" pin strip exactly in the gap between the two rows of pins.
Same with the 0.05" pins, they're on a 0.05" grid, so 1.27mm - and they're in line with the last 0.1" pin in the row