▁sheet ▁they ▁are ▁arranged ▁in ▁a ▁table - like ▁arrangement . ▁The ▁spaces ▁between ▁the ▁single ▁st amps ▁are ▁all ▁of ▁the ▁same ▁size ▁and ▁provide ▁space ▁for ▁a ▁cut ▁or ▁per for ation . ▁ ▁Size ▁and ▁format ▁Today , ▁a ▁sheet ▁of ▁st amps ▁is ▁the ▁most ▁common ▁way ▁of ▁arr anging ▁st amps ▁on ▁the ▁im pressed ▁paper . ▁The ▁number ▁of ▁st amps ▁on ▁a ▁sheet ▁and ▁the ▁format ▁of ▁the ▁sheet ▁depend ▁on ▁the ▁size ▁and ▁format ▁of ▁the ▁individual ▁st amps . ▁Small ▁st amps ▁are ▁usually ▁printed ▁on ▁sheets ▁of ▁a ▁hundred ▁st amps , ▁although ▁the ▁Pen ny ▁Black , ▁as ▁with ▁other ▁pre - dec imal ▁ster ling ▁currency ▁st amps , ▁were ▁printed ▁in ▁sheets ▁of ▁ 2 4 0 ; ▁larger ▁st amps ▁are ▁printed ▁on ▁sheets ▁of ▁fifty , ▁twenty - five ▁or ▁twenty , ▁as ▁is ▁done ▁by ▁the ▁US PS . ▁ ▁On ▁November ▁ 1 3 , ▁ 1 9 9 4 , ▁the ▁Deutsche ▁Post ▁changed ▁the ▁format ▁of ▁its ▁em issions ▁to ▁sheets ▁of ▁ten ▁st amps ▁each , ▁due ▁to ▁reasons ▁of ▁efficiency . ▁The ▁edges ▁of ▁these ▁sheets ▁are ▁spe cially ▁designed , ▁making ▁them ▁a ▁novel ▁field ▁of ▁collect ing . ▁ ▁Print ing ▁sheet ▁In ▁fact , ▁the ▁term ▁printing ▁sheet ▁refers ▁only ▁to ▁a ▁part ▁of ▁the ▁actual ▁printing ▁sheet . ▁This ▁is ▁because ▁st amps ▁are ▁mostly ▁printed ▁in ▁four ▁connected ▁sheets , ▁to ▁make ▁best ▁use ▁of ▁the ▁stamp