8.5x12" Bubble Lined Poly Mailers - 5/16" Cushioning, Case of 50 dimensional weight benchmark

Screen whether listed dimensions can create parcel DIM-weight exposure before a buyer standardizes a SKU. This page is generated from Packrift's top-1,000 exact-spec feed plus SKU/title/URL enrichment from the local product graph.

View on Packrift Open variant URL More Dimensional Weight Benchmark

Benchmark question

Screen whether listed dimensions can create parcel DIM-weight exposure before a buyer standardizes a SKU.

Source facts

SKU	B921
Title	8.5x12" Bubble Lined Poly Mailers - 5/16" Cushioning, Case of 50
Family	mailers
Dimensions	8.5" x 12"
Material / Color	Polyethylene with 5/16" bubble lining / not listed
Pack count	50 ct
Weight	3.45 lb
Source quality	10/10
Canonical product	https://packrift.com/products/8-5x12-bubble-lined-poly-mailers-5-16-cushioning-case-of-50

Calculated benchmark

Listed dimensions: 8.5" x 12".
Three-dimensional cube not calculated because the source does not expose length, width, and height.
Divisor-139 DIM benchmark blocked until 3D dimensions are confirmed.
Divisor-166 DIM benchmark blocked until 3D dimensions are confirmed.
Actual product or shipping weight snapshot: 3.45 lb.

Operational checklist

Use the greater of actual and dimensional weight only after current carrier rules are known.
Verify whether the listed dimensions are product, inner, outer, or shipping dimensions.
Do not present this as a live freight quote.
Confirm opening, self-seal behavior, and usable depth before replacing a box.
Use added protection for rigid, sharp, or crush-sensitive products.

Quality guardrails

Static source snapshots are not live price, inventory, freight, or final substitute approval.
Missing dimensions or metrics are called out directly instead of guessed.
Every page links to the canonical Packrift product page and keeps Packrift.com as the commerce source of truth.