This is a reblog from Halo Waypoint (with commentary by me too of course):

We now have five new stances to choose from for all available print sizes: Patrol, Center Mass, Looks Skyward, Tactical Carry, and Flanker. Not only that, based on your feedback we’ve also added a brand new premium size option – featuring twice the print material, and twice the armor, weapon, and color detail. It’s the ultimate option for the hardcore collector, and you can order yours today.

–End copy/paste–

So you folks may have seen the previous articles I had on these:
3-D Print your Spartan
Halo Product Review: Sandboxr 3D Printed Small Spartan
Halo Product Review: Sandboxr 3D Printed Medium Spartan
Halo Product Review: Sandboxr 3D Printed Large Spartan

Now you have even MORE options.

When you go to customize your spartan for printing, it will take you to Sandboxr’s website. You will see a panel similar to this showing different poses to choose from. The ones below are the five new ones.

Similarly, you will see the sizes to choose from. The XL size is the new one. A whopping $189.99! Don’t forget that with every 3-D Spartan comes a free Supply REQ Pack. 
This is what my Spartan looks like in one of the new poses. (The colors of the real item are WAY better than this though, so don’t let this preview pick fool you.)