Rebar stakes made of 1/2" rebar.
Sizes are 12" and 18".
Recommend heavy duty stakes for staking down your tent using the eave ropes. Tents are like large sails in the wind and your tent will blow away if not staked to the ground properly.
Stakes along walls can be inexpensive stakes available at any sporting goods store or Walmart. These stakes only keep your walls down to prevent wind from blowing in from beneath the walls.