How would Sims even sit on those chairs? Wouldn't their legs cut through the bumpy part? o.O
Considering it's payshit, it just so may be that their legs go through... as well as considering that the chair is so low to the ground, they may as well be floating if the animations aren't correct. That's lolpayshit for ya.
Wicker you say? Remember this beauty? Maybe they should hook up and create wicker spawn.
<snip>
Meeeeemrieeeees....
Personally, I don't like wicker if it's not done right, especially for a visual feel, in a game you can't touch.