A series of small paintings, they're on torn watercolor paper, so it's difficult to give exact sizes. They're from around 8 x 12 cm / ~ 3.2 x 4.7" to about 12 x 12 cm / ~ 4.7 x 4.7", and I used watercolor, acrylic and graphite pencil.
The series of three paintings on the bottom of this post is called "Urban Summer", acrylic and charcoal on 300 g/140 lb watercolor paper, 17 x 24 cm /~ 6.7 x 9.5".