A mailer is the envelope or thin packet you put a small thing in so the post can take it — a book, a shirt, a phone case. It is not usually a heavy box. Shops that sell online buy them in stacks.

A mailer is所謂mailer，是指 the envelope or thin packet you put a small thing in so the post can take it把小東西裝進去、好讓郵局寄送用的信封或薄包裝， — a book, a shirt, a phone case.——像是一本書、一件襯衫，或一個手機殼。 It is not usually a heavy box.通常不會是一個很重的箱子。 Shops that sell online buy them in stacks.做網路銷售的店家會一大疊一大疊地買進這種包裝。

The soft kind has plastic bubbles inside so the thing does not break; people call that a bubble mailer. The stiff cardboard kind stops a photo or a paper from folding.

The soft kind has plastic bubbles inside so the thing does not break;軟的那種裡面有塑膠氣泡，好讓東西不會摔壞； people call that a bubble mailer.大家把那種叫做bubble mailer（氣泡袋）。 The stiff cardboard kind stops a photo or a paper from folding.硬紙板那種則是防止照片或紙張被折到。

Though actually, English speakers also use mailer for the advert itself that comes through the door, and computer people use it for a program that sends email. Those are other jobs for the same spelling. This entry is the packet. The word is ordinary shop and sending-room English, not formal.

Though actually,不過其實， English speakers also use mailer for the advert itself that comes through the door,說英文的人也會用mailer來指那種直接投進家門的廣告傳單， and computer people use it for a program that sends email.電腦業界的人也用這個字指寄送電子郵件的程式。 Those are other jobs for the same spelling.那些是同一個拼法的其他用法。 This entry is the packet.這個詞條講的是那個包裝袋。 The word is ordinary shop and sending-room English, not formal.這個字是店家和寄件間裡的日常英文，不是正式用語。