I would like to purchase an American eagle puffer coat online! And I have no idea what size to get! Normally, I wear sizes medium or small in regular blouses like sweaters or t shirts @ ae! So should I stick with a medium size for the puffer coat? Or should I go up a size(large) since it's Puffy? I'm also wondering if a large would be okay if I wanted to wear thick sweaters underneath? I'm also afraid that if I get a size too big, it'll get bulky around the shoulders and sleeves may be too too long!? I appreciate any help 
many many thanks!! & merry christmas!
many many thanks!! & merry christmas!