Think Knot Shop › Granny Square 70s Mini Dress Image 1 of 1 Granny Square 70s Mini Dress £50.00 sold out Made from this variegated acrylic yarn, this one off granny square 70’s style dress is perfect for festivals or beach wear. Sold Out Added! Made from this variegated acrylic yarn, this one off granny square 70’s style dress is perfect for festivals or beach wear.