Backpack: 31x 16x 42cm / 12.20x 6.30x 16.54inch, Pen bag: 18x 10cm / 7.09x 3.94inch, Shoulder bag: 20x 7x 24cm / 7.87x 2.76x 9.45inch.
Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($28.04): BGZPBC15
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGXD3, BGOD1, AFfbG10, BGbag1249, affbg10, BGbag1023, BGBF3A1, 25Xmund, BGxb653, BGC169, BGVDay10%off, BGOL786, BGTB635, BGCAMP01
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for 3Pcs Backpack Set 20.8L? There we go. The lowest price was: $12.49.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).