Side-by-Side Comparison
North American (ANSI & Arch)
ANSI E vs. US Half Letter
Comparing 2 standards across 8 specifications. 8 key differences identified.
Comparing:
ANSI E
US Half Letter
ANSI E is the largest standardized engineering sheet size defined by ANSI/ASME Y14.1, measuring 34.0 × 44.0 inches (863.6 × 1117.6 mm). Equal to 16 US Letter sheets, it is standard for full-scale commercial aerospace wing spars, naval ship general arrangements, and highway interchange profiles.
US Half Letter (Statement / Memo) is a North American paper format measuring 5.5 × 8.5 inches (139.7 × 215.9 mm), created by cutting a standard US Letter sheet in half across its width. It is the dominant US format for medical prescription pads, restaurant guest checks, bank statement inserts, and mini binders.
Specification Comparison Table
8 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Imperial)
|
34.00 × 44.00 in | 5.50 × 8.50 in |
|
Width × Height (Metric)
|
863.6 × 1117.6 mm | 139.7 × 215.9 mm |
|
Aspect Ratio
|
1 : 1.2941 (17 : 22) | 1 : 1.5455 (11 : 17) |
|
International ISO Equivalent
|
A0 (841 × 1189 mm) | A5 (148 × 210 mm — slightly wider and shorter) |
|
Primary Applications
|
Aerospace structural drawings, naval ship construction plans, state highway transit maps | Medical clinic prescription pads, restaurant receipt slips, flight pilot kneeboard checklists |
|
ANSI Hierarchy
|
ANSI E = 2 × ANSI D = 4 × ANSI C = 8 × ANSI B = 16 × ANSI A | — |
|
Derivation
|
— | Exactly half of a US Letter sheet (8.5 × 11 in cut across the 11 in dimension) |
|
Matching Binder Standard
|
— | Mini 3-ring binder (2.75 in ring spacing) |