This is the Kono KS-20 filter paper designed for "2-cup" brewers (01 size Hario) - and in particular the Kono drippers. There are 40 sheets in this pack, and will perfectly fit any 60 degree dripper (V60, Origami, Flower etc).
This is a fast flowing paper, and is perfect for 5 pour brewing recipes, as we recommend. It's got no taste to the paper to possibly taint brews, but also brings a bright, vibrant quality to brews made with this Kono paper.
It's the same paper that Matt Winton used in his WBrC win in 2021, and is our preferred cone paper currently.