Not much space in this one but that's okay with me since I personally use it as decoration on my desk. Although sometimes I like to carry it in my bag to hold 1 lip gloss in it, just because it's so cute lol. If you're looking to use it as a pouch, it can fit a general sized pen as far as the length goes. I couldn't really fit my more kawaii-type of pens that have characters at the top on them. It has more plush in it than space so it may seem kinda thick but that's the plush taking up all the space. I purchased both the Eclair for myself and the croissant for a friend.