regular size meaning in English

常用规格
正规尺寸

Do you want king size cigarettes or regular size
你要长枝的还是一般(长短)的香烟
Tyres for road making machines , earth moving machines and road graders ; regular sizes in diagonal construction
筑路机械土方机械和平路机用轮胎.斜线花纹的标准规
Breastfeeding helps the uterus return to its regular size more quickly , & reduces the amount of blood loss after delivery
产后喂哺母乳能帮助子宫更快回复正常大小，减少产后失血量。