This is an insulated lunch bag with a gusset. ♡ The lining uses a craft-grade insulation sheet. It's designed to be a little larger to easily accommodate fruit cases, ice packs, etc. The reference images show: A two-tiered lunch box: 16cm wide, 9cm long, 8.5cm high A fruit case: 12cm wide, 8cm long, 4cm high ✴︎Size Length: 17cm Width: 20cm Gusset: 12cm ✴︎About Handmade Items I make each item with care, but as a handmade item by an amateur, there may be some imperfections such as distortions, misalignments, and size errors. Thank you for your understanding before purchasing. Returns and exchanges are not accepted. The gusset will be folded for shipping. Thank you to those who understand handmade items. Fabric used: DeCollection's Design: Based on kcoton video