The set of five stamps cost €4.99, considerably more than the prevailing letter rate of ca. €0.50 per stamp. Each stamp comprised two parts separated by perforations—the official stamp (right portion, red and white) and a tag that served a purely decorative purpose. Thus customers incurred higher costs to adorn their mail with Muppet images that were otherwise unavailable on official Belgian stamps.
- ↑ Catalogue Officiel de Timbres-Poste 2008 (Bruxelles, Belge: Chambre Professionnelle Belge des Negociants en Timbres Poste, 2008)