Privacy Policy

At BikeSize, we take your privacy seriously. This Privacy Policy explains how we collect, use, and protect your information when you use our website.

Information We Collect

We collect information you provide directly to us when using our calculators, such as height, inseam measurements, and preferences. We do not store this information on our servers; it is only used temporarily to provide you with accurate calculations.

Cookies and Analytics

We use cookies and similar tracking technologies to track activity on our website and hold certain information. We use Google Analytics to understand how visitors use our site, which helps us improve our services.

Mediavine Programmatic Advertising (Ver 1.1)

The Website works with Mediavine to manage third-party interest-based advertising appearing on the Website. Mediavine serves content and advertisements when you visit the Website, which may use first and third-party cookies. A cookie is a small text file which is sent to your computer or mobile device (referred to in this policy as a “device”) by the web server so that a website can remember some information about your browsing activity on the Website.

First party cookies are created by the website that you are visiting. A third-party cookie is frequently used in behavioral advertising and analytics and is created by a domain other than the website you are visiting. Third-party cookies, tags, pixels, beacons and other similar technologies (collectively, “Tags”) may be placed on the Website to monitor interaction with advertising content and to target and optimize advertising. Each internet browser has functionality so that you can block both first and third-party cookies and clear your browser’s cache. The "help" feature of the menu bar on most browsers will tell you how to stop accepting new cookies, how to receive notification of new cookies, how to disable existing cookies and how to clear your browser’s cache. For more information about cookies and how to disable them, you can consult the information at All About Cookies.

Without cookies you may not be able to take full advantage of the Website content and features. Please note that rejecting cookies does not mean that you will no longer see ads when you visit our Site. In the event you opt-out, you will still see non-personalized advertisements on the Website.

The Website collects the following data using a cookie when serving personalized ads:

IP Address
Operating System type
Operating System version
Device Type
Language of the website
Web browser type
Email (in hashed form)

Mediavine Partners (companies listed below with whom Mediavine shares data) may also use this data to link to other end user information the partner has independently collected to deliver targeted advertisements. Mediavine Partners may also separately collect data about end users from other sources, such as advertising IDs or pixels, and link that data to data collected from Mediavine publishers in order to provide interest-based advertising across your online experience, including devices, browsers and apps. This data includes usage data, cookie information, device information, information about interactions between users and advertisements and websites, geolocation data, traffic data, and information about a visitor’s referral source to a particular website. Mediavine Partners may also create unique IDs to create audience segments, which are used to provide targeted advertising.

If you would like more information about this practice and to know your choices to opt-in or opt-out of this data collection, please visit National Advertising Initiative opt out page. You may also visit Digital Advertising Alliance website and Network Advertising Initiative website to learn more information about interest-based advertising. You may download the AppChoices app at Digital Advertising Alliance’s AppChoices app to opt out in connection with mobile apps, or use the platform controls on your mobile device to opt out.

For specific information about Mediavine Partners, the data each collects and their data collection and privacy policies, please visit Mediavine Partners.

Affiliate Disclosure

BikeSize participates in affiliate marketing programs, which means we may earn commissions on products purchased through links on our website. These affiliate relationships help support our content creation and allow us to provide free calculators and resources.

We only recommend products we believe in and would use ourselves. The product recommendations provided by our calculators are based on your measurements and preferences, not solely on our affiliate relationships.

All affiliate links on our website are marked with an asterisk (*) for transparency.

Third-Party Links

Our website contains links to third-party websites. We are not responsible for the privacy practices or content of these third-party sites. We encourage you to read the privacy policies of any third-party sites you visit.

Data Security

We implement appropriate security measures to protect your personal information. However, no method of transmission over the Internet or electronic storage is 100% secure, so we cannot guarantee absolute security.

Changes to This Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. You are advised to review this Privacy Policy periodically for any changes.

Contact Us

If you have any questions about this Privacy Policy, please contact us at corrections@bikesize.com.

Last updated: October 23, 2026