When I'm deciding on packaging for my orders there are 4 things I look for: eco-friendly, affordable, cute & easy to get. I want my customers to feel like they're opening a special gift when they get their order but I don't want that to impact my price, processing times, or my environmental footprint. I rarely find supplies that are all 4 of those qualifications, so you'll see each supply is a mix. Here's a comprehensive list of all of the supplies I use when packing up and shipping out my orders! Any of the supplies I use from Amazon will be linked through my storefront, therefore any purchases through these links give me a small commission.
Tape
Scotch Tape:
*affordable and easy to get
Box Tape:
*affordable and easy to get
Water Activated Branded Tape:

https://www.stickermule.com/products/packaging-tape
*cute & eco-friendly
(they run sales on this tape about once a month where you can get it at a super affordable price)
Paper Products
Cardstock Paper:

*affordable and easy to get
Kraft Envelopes:
*cute, affordable and easy to get
Custom Wrapping Paper:

https://www.noissue.co/custom-packaging/custom-printed-tissue-paper
*cute and eco-friendly
Business Cards:

https://www.moo.com/us/business-cards/super
*cute and easy to customize/get
Boxes and Mailers
Boxes (10x8x3, 20x12x4, 15x15x4, 20x20x4):
https://www.uline.com/BL_403/Flat-Boxes
*affordable and easy to get
Bubble Mailers (8.5x12):
*cute, affordable and easy to get
Reusable Bubble Mailers (8.5x10.75):
https://www.ecoenclose.com/shop/recycled-mailers/recycled-bubble-mailers/
*affordable and eco-friendly
Miscellaneous
Stamps:
(back of signs)

https://www.zazzle.com/pd/spp/pt-hamptontech_selfinkingstamp
*cute, affordable, eco-friendly (compared to stickers)
(outside of box)

*cute, affordable, eco-friendly (compared to stickers)
Label Printer:
*easy to get
4x6 Labels:
*affordable and easy to get
Twine:
*cute, affordable, easy to get
Greenery:
https://www.michaels.com/boxwood-pick-by-ashland/10546920.html
*cute, affordable, easy to get