Choose Colorful 4x8 Poly Bubble Mailers Pink Pastel Blue - Etsy UK
The “bubble wrap” this seller used to ship me one small item. There's 25 USPS bubble mailers in this box. : r/Flipping
You can use a vac sealer to seal bubble mailers and reuse them! I just used the seal function, not vac, it works great and no tape needed! I cut one up