Party Mouse on a Bicycle — Illustrated Birthday Postcard by Tonya Tkach

A cheerful grey mouse in a pink party hat pedals a yellow bicycle, three balloons bobbing behind and gift-wrapped boxes tied to both racks — the greeting ‘Вітаю!’ (Ukrainian for a warm congratulations) written above.

• Density: 350 g/m²
• Size: 10×15 cm

This one's built for a birthday envelope, though it holds its own in a postcrossing swap too.