lovely bags are they from the new collection the leather is TDFI have both and find they hold everything I need. The twiggy obviously is longer. The box is not really that much smaller in terms of capacity, it's just a different look in my opinion. I love them both!
Here's a picture of my cornflower box and lilac twiggy so you can see size difference.
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Box is $995 and twiggy is $1095 USD.