Mouse_instructions.7z -

A 15x15 cm (6x6 inch) sheet is standard, but any size works. Optional: A pen to draw eyes on the finished mouse. Step-by-Step Folding Instructions

Fold the entire model in half along the original diagonal center line (kite folds inside). mouse_instructions.7z

If you meant a different kind of "paper" or instructions, could you please clarify: A 15x15 cm (6x6 inch) sheet is standard, but any size works

Fold the pointed top corner down to meet the center point of the bottom edges. mouse_instructions.7z

Did you want instructions for a specifically? Origami Mouse Instructions

Fold one side up diagonally, then unfold and refold it down (rabbit ear fold) to make one ear. Repeat on the other side.