What shoes?

Hey ladies! My bridesmaids picked their bridesmaid dresses and this is what they went for. This is the exact colour and everything. I LOVE these. We were struggling to think of what kind of shoes to pair. The wedding is outside on july and the ceremony has really soft ground so we were thinking flat sandals. What colour would you go with? Do any of you ladies know where we can order the shoes from? Thank you in advance!