The following post is brought to you by turnstone. Our partners are hand-picked by the Design Milk team because they represent the best in design.

Steelcase Store & turnstone are giving away one free chair every week until October 28th just for using their new Design My Space 3D tool and this week is the LAST CHANCE to enter to win!

Their new online tool not only helps you design your office space, but it also helps you visualize in 3D on the web. Giving you the power of an interior designer, you can create a personal office space of your dreams, or maybe one that fits better with reality — and you can even share it with your team straight from the program. The drag and drop tool is pretty easy to use — so there’s no need to take a class on how to use it like other cumbersome online design tools.

The last winner will be drawn on Monday, October 29th, so hurry up and design your dream space for a chance to win a turnstone cobi chair.