According to my tape measure, the Seat-tube is 14.5" C-to-C, 17.5" C-to-top.
Top tube length C-to-C (actual top tube) is 22.5"
Effective horizontal top tube is 23.25" C-to-C
Looking on the Cotic website (if you search for Cotic Soda, it takes you to info page, even though the model is...