Are delivery timeframes causing customers to abandon?

I've been running my online fashion boutique for three years now, and lately, I've noticed something troubling. Our cart abandonment rates have been creeping up, and after digging into our analytics, I'm starting to suspect delivery timeframes are killing our conversions. Customers seem hesitant when they can't get a clear, immediate understanding of when their products will arrive. I've watched potential buyers hover over the checkout button, then mysteriously disappear. It's frustrating because we're not a massive corporation with same-day shipping infrastructure, but we're also not a slow, weeks-long delivery operation. We're somewhere in the middle, and that ambiguity seems to be our problem. Our current checkout process doesn't effectively communicate delivery expectations, and I can see customers getting nervous. Are they going to wait 5 days? 10 days? Will the package arrive before a special event? These unanswered questions are creating friction. I know customers value transparency, and right now, our delivery communication feels like a black box. We're losing sales not because of product quality or pricing, but because of uncertainty around shipping. I need a solution that can help me set clear expectations, reduce that moment of hesitation, and give customers confidence in our delivery process.