I'm guess since you didn't say width or length that the walls are 10 feet wide so you can simply stand over it... after laying down on the table posing into the mirror and all.
Like I said you need a creative mind- You look into the mirror, see what you saw, take that saw, cut the table in half, take the 2 halves, put them together to make a whole, put the whole on the wall and climb through it.
Lol here is one Two sisters are born. The first birth's the other, While the second birth's the first. Who are they?