The Bolbbalgan4 merchandise is not easy to get. Especially when it's been a while since the limited edition collection of official items was released back in 2017. This Ahn Jiyoung T-shirt is not official but it can be a great substitute if you are a fan of the vocalist. It features an artwork of her on front.
The T-shirt comes in many different colors including black, white, gold, purple, denim, navy, blue, light blue, army, creme, grey, dark grey, green, red, dark red, brown and orange. The solid colors are made of preshrunk cotton (100%), while heather grey and denim heather are made of a combination of both cotton and polyester. This is a very well done product.
The T-shirt is available in 8 sizes so getting the right one won't be a problem. The measurements are: S (chest: 36 inch, length: 28 inch), M (chest: 40 inch, length: 29 inch), L (chest: 44 inch, length: 30 inch), XL (chest: 48 inch, length: 31 inch), 2XL (chest: 52 inch, length: 32 inch), 3XL (chest: 56 inch, length: 33 inch), 4XL (chest: 60 inch, length: 34 inch) or 5XL (chest: 64 inch, length: 35 mm).
You can get this piece of merchandise for a reasonable price on Redbubble.