Epson 2250 - Manual (Page 21)

Running the Self Test
2.
Pull the paper cassette out of the printer.
3.
Fan a stack of A4 or letter-size paper and then even up the edges.
Note: The US version uses letter-size paper; all others use A4
paper. The paper size (letter or A4) is shown on the inside of the
paper cassette. The cassette holds up to 50 sheets (70 kg or 22 lb
maximum).
4. Pull out the paper support.
Setting Up the Printer 1-9