1. The Industry Sizing Blindspot

Most diaper manufacturers terminate their sizing matrix at XL or 2XL. However, pediatric growth data in North America, Europe, and the Middle East reveals that up to 18% of toddlers aged 2.5 to 5 require extended sizing (18kg to 35kg+) during late potty training or nocturnal bedwetting.

2. Tingshuang's Extended S to 4XL Spectrum

The Susan Mammy flagship brand pioneered the industry's most comprehensive sizing continuum:

• Size NB / S (0 - 6 kg): Umbilical cord notch protection, ultra-soft silk topsheet, 500ml capacity.
• Size M (6 - 11 kg): Dual-wing gathering, 3D active crawl chassis, 750ml capacity.
• Size L (9 - 14 kg): Reinforced SAP density in central strike zone, 950ml capacity.
• Size XL (12 - 17 kg): High-capacity overnight matrix, 1,100ml capacity.
• Size 2XL (15 - 22 kg): Wide waistband and extended hip coverage, 1,200ml capacity.
• Size 3XL & 4XL (18 - 35 kg+): Heavy-duty training briefs designed for older children and youth with special comfort needs, up to 1,350ml absorbency.