Original Japanese name: かぎ針編みの
ルームシューズ (Kagibari ami no rūmu shūzu).

Direct link to pattern PDF (or from the pattern page, scroll down to the PDF icon underneath the photo). Pattern is entirely in Japanese but charted.

Size

These crocheted shoes have a finished size of approx. 22cm; according to the pattern they should fit a 23cm foot.

Gauge

Gauge is not listed in the pattern, but it calls for Japanese size 7/0 (4.0 mm) hook.

Yarn

There’s no yarn information other than that you should use about 70 grams of DK weight yarn. Based on cotton yarns of this size, I estimate 70g would be approx. 128.33 meters (140.34 yards).