Here’s a list of essential equipment, along with some optional tools, to help you run a successful Amazon FBA business.
Essential Equipment
Label Printer – I have two of these, one for the 4×6 shipping labels and one for the SKU labels.

Another alternative Label Printer – Another option if the first one is unavailable.

Label Holder – A holder for your shipping and SKU labels.

SKU Labels – I use these for SKU labels to cover the manufacturer barcode

Other Alternative SKU labels – Another option if the first one is unavailable.

4×6 Shipping Labels – Used for UPS shipping label

Boxes – I use 610 x 457 x 457 mm. These are great because they can be easily cut down to size if needed.
Medium Poly Bags – Various sizes here, but here is a medium sized Poly bag (Good for toys, larger cosmetic items etc). Sized 28cm x 36cm (11″ x 14″)

Small Poly Bags – Various sizes here, but here is a small sized Poly bag (Good for small cosmetic items). Sized 18cm x 21cm (7″ x 8″)

Packing Tape – Essential to get a bunch of rolls, always useful and quite cheap
Tape Gun – Saves so much time packing boxes with this tape gun
Optional Equipment
A4 SKU Labels – Use these if you have existing ink jet / laser printer and don’t want to commit to a thermal printer just yet
Barcode Scanner – I use this to make it easier to scan products and build out shipments
Document Scanner – Not critical but makes it easier to scan invoices/receipts.