A Pendulum Scale (ペンデュラムスケール Pendyuramu Sukēru, Pスケール on cards) is a number that appears on a blue diamond and red diamond of Pendulum Monstees. They determine a Pendulum Summon. When 2 Pendulum Monsters are set in their Pendulum Zones, a Pendulum Summon could occur to Pendulum Summon as many monsters from your hand with Levels in between the Pendulum Scales. For example, "Stargazer Magician" (Pendulum Scale: 1) and "Timegazer Magician" (Pendulum Scale: 8) could occur a Pendulum Summon of as many Level 2-7 monsters from your hand and Pendulum Monsters from the Extra Deck.