The adage, try before you buy, may be more apt for clothes than any other product. No matter how typical your proportions are, most brands use a “fit model” – a person whose job it is to try on their clothes – with their own unique body shape, which is why we are all subject to confusing variances within clothing sizes.
Making sure something fits well is important for a long-lasting wardrobe, as poorly fitting garments can strain, stretch and ultimately break faster. Fit can also indicate how well something has been constructed, which is a good indication of its quality.