TTS (True To Size) indicates that a garment or sneaker fits consistently with standard sizing expectations—your usual size will fit normally. The term exists because sizing varies significantly across brands and even between different items from the same brand. Knowing whether something runs TTS, big, or small is essential information for online purchasing. Streetwear forums and product reviews frequently address fit: 'These run TTS' or 'Size down one for TTS fit.' The advice matters particularly for resale purchases where returns may be difficult or impossible. Japanese brands often run smaller than American brands; European sizing differs from US sizing; vintage items may use older size standards. Experienced collectors develop mental databases of how different brands fit them specifically. Providing accurate TTS information is considered community service; misleading fit advice wastes people's money on unwearable purchases.