The simple way is to draw it using the Bitmap() command, for which you specify the specify the sprite's dimensions by putting its width (1 byte) followed by its height (1 byte) at the start of the sprite data. You can either insert these at the start of the hexadecimal sprite data (in hexadecimal), or if you want to enter the size in decimal numbers, the following would be equivalent:

Data(20,20)→Pic1
[(picture)]

Note that each row of image data must be padded on the end with zero bits such that each row takes up a whole number of bytes; in the case of a width of 20, each row should consume ceil(20/8) = 3 bytes. It doesn't seem like your data follows this, so you'd need to amend it.