Global Sandals Market Size, Share & Demand Report By Product Type (Flat Sandals, Sports & Outdoor Sandals, Casual Sandals, Fashion & Designer Sandals, Comfort & Orthopedic Sandals, Heeled Sandals, Flip-Flops & Thongs), By End User (Men, Women, Children), By Material (Leather, Synthetic, Rubber, Textile/Fabric, Bio-Based Materials), By Price Range (Economy, Mid-Range, Premium), By Distribution Channel (Offline Retail, Online Retail), By Region & Segment Forecasts, 2026–2031