Purchased for 6.60 euros and it includes a small "glass". Following the instructions carefully:
- It applies perfectly to the screen (maybe if you look at it from the side, it loses 0.01 cm, but when you look at it from above, the whole screen is visible).
- It left me with 2 bubbles in the corners (hence the 4 stars), but personally it doesn't bother me as it is not visible when the screen is on.
- The protection is excellent and the touch sensitivity is not affected at all.
Update: after 1 month of use, the bubbles are getting bigger. It's like it's coming off. I press them and it sticks again for a few days, but eventually I will buy a smaller screen protector because this one doesn't seem to fit well

In Apple Watch Series 5 44mm, the screen shrinks a bit and air bubbles form when it is applied. So you have to remove it, stick it again, and even though I watched several videos and was careful, after 2-3 failed attempts, it cracked at the corner and looks very bad. After managing to put it on properly, it greatly affected the watch's functions. It's a shame for Baseus because I have bought other products (chargers, cables, etc.) that were perfect.