Aust post stamps mail envelope 15mm x 15mm

A very specific question!

According to the Australian Post website, the standard size for a letter envelope is 110mm x 220mm. However, you're asking about a smaller size, specifically 15mm x 15mm.

Unfortunately, it's not possible to send a letter or mail item in an envelope of that size through the Australian Post. The minimum size requirement for a letter envelope is 90mm x 140mm, and the maximum size is 235mm x 315mm.

If you're looking to send a small item, you may want to consider using a small parcel service or a courier company that offers a smaller package size option. Alternatively, you could consider using a specialized service like Australia Post's "Small Parcel" service, which has a minimum size requirement of 120mm x 120mm x 120mm.

It's worth noting that the Australian Post has specific guidelines and regulations for sending mail and parcels, including size and weight restrictions. If you're unsure about the size or weight of your item, it's always best to check with the Australian Post or a courier company for guidance.