Pre-translation attempt:
Sakuya has been growing a lot whereas remilia hasn't grown a single bit

Young Sakuya: >v< Cute!
Remilia:>m< Cute! Uuu!

In her defense, Remi is at least 500 years old. Ten years would barely be a blink of an eye for her (and her height).

Well, I would be happy about it, wouldn't you, too?

Consider the second panel and the fact that the highest scratch is shorter than Reimu and Marisa (and Sakuya definitely not shorter than both of them). I guess that Remilia stop recording Sakuya height when she cannot reach her height to scratch the wall. If my guess is true, does it qualify pool “Can’t you just fly?”

Quang243 said:

Consider the second panel and the fact that the highest scratch is shorter than Reimu and Marisa (and Sakuya definitely not shorter than both of them). I guess that Remilia stop recording Sakuya height when she cannot reach her height to scratch the wall. If my guess is true, does it qualify pool “Can’t you just fly?”

Marisa might also just be standing closer to the viewer lol.

Only now did it hit me that the headgear is also measured.