This was the bag (fukubukuro) for the year 2018. You had to spend 23000 yen to buy the mistery bag (with clothes inside)
It was too expensive and hard to get at that time for me, so I looked for it for quite a long time until I found it.
I bought it a few years ago and have kept it in my closet since then. It's in excellent condition. No flaws.

This one is hard to let go... I love the print and everything. I haven't used it because I didn't want to damage it.

Color is a greyish-bluish-lavender (I am not good with colors which are in between colors?) depending on the sunlight as you can appreciate on the photos, taken on different days. 
The bag is huge and could also be used as a cute cushion!

Measurements:
Length without strap: 59cm (23") 
Strap length: 25-26cm (10")
Width: 48cm (19")