DC Super Hero Girls Thank You Cards. Super Hero High is in session and all you favorite Girl Super Heroes have been assigned to help you throw a super charged, super hero, super girl power party, featuring Batgirl, Wonder Woman, Harley Quinn and Poison Ivy. 8 Thank You Notes/8 envelopes and 8 Thank You Stickers. Front: Thank You! Inside has spaces for your own personal message. Approximately 4.5in x 6in.