Cheapest Bubble Wrap — Rolls, Sheets & Bulk Pricing
Bubble wrap comes in three standard bubble sizes: 3/16" (small) for lightweight fragile items like glasses and ceramics, 5/16" (medium) for general electronics and boxed goods, and 1/2" (large) for heavy or oddly-shaped items that need maximum cushioning. Rolls are cheaper per square foot than pre-cut sheets, but sheets save time if you ship a consistent item size.
Current listings — sorted by price

Air Bubble Cushioning Wrap Roll [12 Inch x 175 Feet Total Perforated Every 12 "

1/2" SH Recycled Large Bubble Cushioning Wrap Padding Roll 100' x 24" Wide 100FT

Bubble Cushioning Wrap 1/2" 250 ft² x 12'' Perforated Every 12" LARGE BUBBLE

3/16" SH Small Bubble Cushioning Wrap Padding Roll 700'x 12" Wide Perf 12" 700FT

Small Bubble Cushioning Wrap Anti-Static Roll 100 ft x 12'' Wide
Buying tips
Small bubble (3/16") is the best all-around choice. It conforms tightly around items and uses less material per wrap than large bubble.
Buy by the roll, not by the sheet pack. A 12"×175' roll is typically $12-18 and wraps 50+ items. Pre-cut sheets cost 3-4× more per square foot.
For electronics, use anti-static (pink) bubble wrap. Standard bubble can generate static discharge that damages circuit boards.
Wrap items with bubble-side IN (facing the item). The flat side out gives a cleaner look and the bubbles cushion better against the item surface.