Can spaghetti straps support a heavier bust?

Yes, when the dress is built for it. A structured internal bodice with full cup support, vertical boning corset, and reinforced strap anchoring can carry a heavier bust on spaghetti straps. Some brides choose slightly wider straps (still thin but with more surface area) for additional support. A bridal seamstress can advise based on your bust shape and dress style.