Georges St-Pierre teased a move up to middleweight to challenge UFC champion Michael Bisping for his long-awaited UFC comeback, but that isn't the only weight class in the sights of the returning welterweight legend.

"If I wanted to, I could fight at lightweight as well. Easy. Easy," St-Pierre said Monday on The MMA Hour.

St-Pierre, 35, spent his entire UFC career fighting at 170 pounds, twice capturing the belt and defending it nine consecutive times before vacating the title and taking an extended hiatus from the sport in Nov. 2013 following a win over Johny Hendricks.

Throughout his career, St-Pierre resisted calls to move up in weight and challenge longtime UFC middleweight champion Anderson Silva in a superfight, however now that St-Pierre is freed from the responsibilities that come with holding the welterweight title, he said on Monday that he is excited to look at his options "more experimentally," and that he would be willing to journey both up and down in weight for the right big money fight.

Standing at 5'10", St-Pierre acknowledged that he would be significantly undersized at middleweight, especially against a 6'2" fighter like Bisping who has fought as high as light heavyweight in the UFC. But St-Pierre also insisted that he would be confident his skills could bridge the gap in size.

Plus, if his plans at 185 don't work out, St-Pierre knows he always has the option to move down and challenge for history at lightweight.

"I'm not a big welterweight," St-Pierre said. "I walk around 187 (pounds). I'm 186, 187 when I wake up in the morning, and I could easily make it (with) a diet, because a lot of lightweights are bigger than me. Welterweight, I don't even talk about it because most of them are bigger than me, of course, and middleweight, they're much bigger than me. But it's not really about size. It's about skills."