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Measured on six things

A web tool that helps travelers check luggage dimensions against airline policies to avoid fees and hassles.

Growth

1.4-year-old domain with scattered Reddit recommendations; no review platforms, community, or funding signals. Claims 100+ airlines but real usage reports lower.

About this app

SizeMyBag is a practical and straightforward web application designed for travelers who want to ensure their carry-on or checked baggage complies with airline size restrictions. It aggregates policies from major airlines like Ryanair, KLM, and American Airlines, providing a centralized resource for quick dimension checks. The tool is particularly useful for frequent flyers, budget-conscious travelers, and first-time flyers who often struggle with inconsistent and confusing airline guidelines. While it excels in simplicity and ease of use, it lacks advanced features such as real-time policy updates, interactive measurement guides, or mobile app support, which are available in competitors like SafariBags and LuggagePros. The minimalist design focuses on functionality with a user-friendly interface, but it could benefit from improvements in accessibility, visual aids, and integration with airline APIs for more dynamic updates. Overall, SizeMyBag is a reliable tool for pre-trip planning to dodge unexpected baggage fees, though it has room for growth in features and user experience enhancements.

Key features

1Free instant dimension checker against 100+ airline policies
2Centralized resource for Ryanair, KLM, American Airlines and more
3Simple three-field input for length, width, height

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Frequent travelers

Pain points

Unpredictable baggage fees, confusing airline policies

Primary needs

Quick compliance checks, cost avoidance

Demographic

Budget-conscious flyers

Pain points

Overweight/oversize penalties, last-minute repacking

Primary needs

Accurate size validation, pre-trip planning

Demographic

First-time travelers

Pain points

Unfamiliarity with TSA/airline rules

Primary needs

Clear guidelines, simplified measurement process

Scout Review

Written by AI from measured evidence, scored out of 100.

SizeMyBag serves as a practical, free checker for travelers avoiding fees, aggregating policies from major carriers with straightforward inputs. Strengths lie in its focused simplicity and real-user recommendations, while weaknesses include limited polish, missing advanced features, and sparse traction signals. It fits the median indie tool profile: competent for basics but not standout against more feature-rich options.

Measure by measure

Usability

Straightforward dimension checker praised on Reddit for simplicity and speed, but lacks helpers, onboarding, or advanced filters; form jumps straight to inputs with minimal guidance.

Design

Average visual execution with strong CTA contrast and clean hero layout, but inconsistent styling, disconnected stock imagery, and abrupt dense legal text hurt polish.

Speed

Mobile Lighthouse 46/100 with slow LCP/FCP; desktop better at 69. No user complaints surfaced, consistent with a lightweight static tool.

Security

HTTPS + HSTS in place; missing CSP, security headers, SPF/DMARC, and any compliance certifications or audits.

Accessibility

Automated score 77/100 undermined by ARIA, contrast, labeling, and heading order failures. No dedicated a11y docs or multi-language support found.

Growth

1.4-year-old domain with scattered Reddit recommendations; no review platforms, community, or funding signals. Claims 100+ airlines but real usage reports lower.

Improvement areas

Add real-time updates, visual measurement guides, and mobile app
Improve accessibility compliance and consistent UI styling
Expand verified coverage and add community/traction signals

Design & Usability

SizeMyBag delivers a no-frills web tool focused on quick airline baggage checks. The two-column hero and prominent yellow CTA create decent first impressions, though inconsistent button colors and an immediate wall of privacy text feel jarring. Usability benefits from direct inputs and positive Reddit feedback for simplicity, yet the absence of unit toggles, measurement tips, or filters keeps it basic. Compared to alternatives, it prioritizes speed over guided experiences found in more polished competitors.

Speed & Security

Performance metrics show room for optimization, especially on mobile where Lighthouse reports slow loading. Security is table-stakes with HTTPS but lacks advanced headers or third-party validations. No breaches or complaints noted, aligning with its small footprint. Peers like LuggagePros may offer more robust data handling claims, while SizeMyBag stays lean and functional for its core check.

Accessibility & Growth

Accessibility audits reveal multiple ARIA and contrast issues despite a decent automated score, with no public commitments to improvements. Growth remains modest after 1.4 years, driven by organic Reddit mentions rather than broad reviews or communities. It trails alternatives with larger claimed airline coverage and visual aids, but early user endorsements suggest potential if traction builds.

Conclusion

For frequent flyers needing fast pre-trip validation, it delivers value without complexity. Continued iteration on feedback and visibility could elevate it beyond niche Reddit mentions.

Suggestions for improvement

Add unit toggles and measurement tips directly in the form for faster comprehension.
Implement basic security headers (CSP, frame protection) and publish a simple security page.
Fix ARIA labels, contrast ratios, and heading order to improve the accessibility score.
Expand verified airline coverage and add changelog or community links to build trust.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	SizeMyBag	SafariBags Luggage Size Chart	LuggagePros Airline Restrictions Tool
Number of airlines covered	~40-100 (site claims 100+, users report ~40)	Detailed charts but no specific count or filtering	Comprehensive data with weight calculators
Visual guides / interactive tools	Basic form inputs only; no visuals	Detailed visual luggage sizing guides	Cluttered interface with calculators
User-friendliness / interface	Minimalist, simple per Reddit feedback	Lacks airline-specific filtering	Cluttered, less user-friendly