Amazon.com : Large Square Paddle Brush by Better Beauty Products, Detangling Brush with Long Ergonomic Handle and Scalp Massage Bristles with Soft Ball Tips, Professional Salon Brush, Black : Beauty & Personal
B10 Porcelain - China Painting Brush Set - square shader, synth.
10 Square Brushes - Free Photoshop Brushes at Brusheezy!
Square Pin Cushion Brush - Seiseta Shop-us
Are These Square-Shaped Brushes Better Than the Round Versions? | InStyle