The manufacturer will detail the part they will sell you using a datasheet. The datasheet will describe what the device does and the physical package in which it comes. There may be more than one package for a part.
Each package has a set of electrical pins that you must connect to your circuit. The naming, allocation and description of these pins are in the datasheet.
To use a part in DEX you will need to know its package, its pinout and its recommended footprint.
The PIC10F200 micro-controller datasheet is available at https://ww1.microchip.com/downloads/en/DeviceDoc/41239D.pdf
For the Microchip parts there is also an additional packaging specification available at https://ww1.microchip.com/downloads/en/PackagingSpec/00049AU.pdf
The datasheet has a pinout of the part as shown below.
The physical package is shown below
The physical package parameters are defined below.
