英语里面圣诞节礼物函怎么写？

Dear xx,
I will send a Christmas present to you today.

Hope you will like it.

Yours,

xxx
你是在寄圣诞礼物时写的信呢,还是单单想知道"圣诞礼物函"英文怎么写啊? 好像应该叫Christmas present card.

Christmas gifts