Heidi Klum was feeling blue during a recent visit to Germany.

The supermodel was present on Monday to attend the Calzedonia billboard presentation at Friesenwall in Cologne.

Klum stars in the campaign, modeling the brand’s Balconette swimsuit in a powder blue hue.

To match the campaign, Klum wore a pair of light blue, strappy, barely there sandals for the event.

The model wore sandals with a tall stiletto heel, measuring approximately five inches. The shoes featured a slim strap across the toes.

The sandals featured slim straps around the heel area, and although her pant leg obscured it, the shoes likely had an ankle strap to hold them in place. The shoes featured a round-toe silhouette.

Klum dressed the heels down with a light wash denim look, wearing an oversize jean jacket and high-waisted mom jeans. The hem landed right at the start of her foot, which helped showcase the shoe.

The model has been sharing images from her Calzedonia summer 2025 campaign, and even celebrated her 52nd birthday earlier this month by posing in several designs from the swimsuit brand.

Klum can often be found at the world’s biggest red-carpet events, frequently wearing similar footwear. Whether in a gown or in jeans, the “Project Runway” personality can often be found in barely there strappy sandals or sky-high heels by designers like Gianvito Rossi, Aquazzura and Christian Louboutin.