Build a square from squares?

Geometry Level 1

Can you use all of the pieces to build a large square? And if possible, what is its side length?

one $6 \times 6$ square
two $5 \times 5$ squares
three $4 \times 4$ squares
four $3 \times 3$ squares
five $2 \times 2$ squares
six $1 \times 1$ squares