Monitoring the stomach size of cattle is crucial for the early detection of health problems like bloat, malnutrition, or digestive disorders, allowing for appropriate intervention. It also helps track pregnancy progress and ensures optimal nutritional intake, directly impacting milk production in dairy cattle and growth in beef cattle. This practice enhances overall health, improves productivity, and helps prevent serious health complications. This paper introduces a smart wearable belt designed for comprehensive cattle health monitoring. The belt features measurement markings and sensors to gauge the stomach size of cattle accurately, providing essential data for effective livestock management. It is used for various purposes, including monitoring nutritional intake, detecting digestive issues early, tracking pregnancy, identifying illness, assessing stress and behavior, managing breeding, and improving milk production and beef cattle's meat quality. The belt incorporates an Arduino-controlled system with a GSM module that sends automatic alerts when certain thresholds are met, facilitating timely interventions. This tool enhances cattle welfare and farm efficiency by enabling real-time monitoring and automated notifications.