Gold bracelets, like all jewellery made from gold, can potentially stretch over time, especially those made from purer, softer gold (higher karats, such as 18k or 24k gold). The stretching is usually due to the metal's natural malleability and the wear and tear of daily use. Bracelets that are thin, or gold chain bracelets can be more prone to stretching. Factors such as pulling, snagging on clothing, or the weight of charms can accelerate this process. However, solid gold bracelets or those made from lower karat gold, which is harder due to the presence of other metals in the alloy, are less likely to stretch significantly. Proper care and occasional checks by a professional jeweler can help maintain the bracelet's original shape and fit.