Rasoolullah (ﷺ) wore shoes like sandals or slippers. Rasoolullah (ﷺ) also wore black leather socks and during Wadhu passed his moist hanks over them (made Masah). His shoes had two straps between the toes (Uswah: Mirqaat). There was a strap at the back as well.
The Shoes of Rasoolullah (ﷺ) were one span and two fingers long and 7 fingers wide; there was a space of two fingers between the two straps at the toe end (Uswah)
Rasoolullah (ﷺ)used to wear shoes made of leather that was smooth after the removal of the animal hair, and after wadhu He would place his feet into them because they were pure and made in such a way that his toes would thouch the ground. (Uswah)
Rasoolullah (ﷺ) also wore shoes made of smooth leather. (Mishkaat)
Rasoolullah (ﷺ) would would grip his shoes with his left thumb and index finger. (Shamaail Tirmidhi)
Hazrat Anas (Radiallahhu’ anhu) narrates that from the sunnah is that one should remove his shoes and place them to the left side when sitting. (Mishkaat)
Source:
The Quran Foundation