When evaluating silk pocket squares, the most critical factor is the Momme weight (mm), which measures silk density; for premium accessories, a range of 14mm to 16mm is ideal for achieving the perfect 'drape' and 'puff' in a suit pocket. Additionally, you must verify the edge finishing technique. High-end buyers prioritize hand-rolled edges (approximately 3-4 stitches per inch) over machine-stitched hems, as hand-rolling provides a unique, voluminous border that machine stitching cannot replicate.