Quick Verdict
These two aluminum stock options are priced just 29 cents apart-USD 29.87 and USD 29.58-but they are built for different jobs. The 1/4" 6061 plate is a compact 12" x 12" piece with a thicker cross-section, while the 1/16" 3003 sheet is a 12" x 24" panel with a corrosion-resistant alloy. If you need a thick square, pick the 6061 plate. If you need a long, corrosion-resistant sheet, pick the 3003.
Comparison at a Glance
| Option | Listed Price | Bar | What stands out |
|---|---|---|---|
| 1/4" 6061-T6 Plate (12" x 12") | USD 29.87 | 6061-T6, compact 12" x 12" square, non-cosmetic stock | |
| 1/16" 3003 Sheet (12" x 24") | USD 29.58 | 3003 alloy, 12" x 24", mill finish |
The listed price difference is only $0.29. The real difference is that one piece is four times as thick in a 12" x 12" footprint, while the other is twice as long and made from corrosion-resistant 3003.
Where Each Option Wins
- 1/4" 6061-T6 Plate: This is your choice when the job needs a compact 12" x 12" piece at 1/4" thick. It's 6061-T6 stock and listed as not cosmetic, so surface finish isn't the priority; the description notes the plate may have minor scuffs or scratches and can be buffed or polished.
- 1/16" 3003 Sheet: This is your choice when you need a 12" x 24" panel. The 3003 alloy is described as offering excellent corrosion resistance, and the mill finish gives you a clean starting surface. It also carries the lower listed price.
Product Notes
1/4" 6061 Aluminum Plate (12" x 12")

This is the thicker, more compact blank in the matchup. At 1/4" thick with a 12" x 12" footprint, it's made from 6061 aluminum with a T6 temper and a plus/minus 1/8-inch tolerance. It's listed at USD 29.87, which is 29 cents more than the 3003 sheet. The product description is clear that this is not a cosmetic sheet-it may have minor scuffs or scratches-so it's best for work where the surface won't be on display. If you do want a better finish, the description says it can be buffed or polished. This is the option to consider when your project needs a solid 12" x 12" square of aluminum stock at 1/4-inch thickness.
1/16" 3003 Aluminum Sheet (12" x 24")

This sheet gives you a larger surface area at a slimmer thickness. It measures 12 inches by 24 inches and is only 1/16 inch thick, with an alloy type of 3003 and a mill finish. The description highlights excellent corrosion resistance, which makes it a practical choice for panels or projects exposed to moisture. It's listed at USD 29.58, making it the lower-priced option in this head-to-head by 29 cents. The trade-off is thickness: at 1/16 inch, it gives you a much thinner cross-section than the 6061 plate. Instead, it suits work that calls for a long, corrosion-resistant sheet that can be cut to size.
Final Choice by Use Case
- For a 12" x 12" square of 1/4-inch aluminum plate with 6061-T6 temper and the option to buff or polish the surface, choose the 1/4" 6061 plate at USD 29.87.
- For a 12" x 24" sheet of 1/16-inch 3003 aluminum with excellent corrosion resistance, choose the 1/16" 3003 sheet at USD 29.58.