Since he had no idea what she meant by figuring out a size for him, but knew he would find out soon enough, Robin merely smiled at her. The smile turned to a grin when she tried to assure him about his current outfit. He leaned down slightly and murmured, "You're a terrible liar, Marian." His teasing mood shifting to the mischievous, he added, "I can take it off, if you like...?"