How to Choose the Right Water Blob® Size for Your Camp

Size Matters More Than You Think

Selecting the right Water Blob® size is one of the most important decisions you will make when adding a blob to your waterfront program. The size affects everything—from the height and excitement of the launch to the number of participants who can enjoy the activity safely, the depth of water required, and the overall investment.

We have been manufacturing commercial-grade Water Blobs since 1984, and in that time we have helped hundreds of camps, resorts, and lakefront property owners find the right fit. This guide distills four decades of experience into a straightforward comparison of our four most popular sizes: 25 feet, 30 feet, 35 feet, and 40 feet.

The 25-Foot Water Blob®: Compact and Versatile

The 25-foot model is our most compact commercial-grade option and an excellent choice for smaller waterfronts, private lakefront properties, and programs that serve younger campers. It delivers a thrilling launch experience while requiring less water depth and shoreline space than the larger models.

Ideal for: Private lakefront homes, small day camps, youth programs serving campers under 12, and facilities with limited waterfront space or shallower water areas. The 25-foot Blob is also a popular choice for camps adding a blob to their program for the first time.

Water depth requirement: A minimum of 8 feet of water is recommended at the launch end. The compact footprint means the 25-foot model can fit in areas where larger blobs simply would not work, making it the go-to option for facilities that love the idea of blob jumping but have spatial constraints.

The 30-Foot Water Blob®: The All-Around Favorite

The 30-foot Water Blob® is our most popular model and the one we recommend most often for mid-sized summer camps. It strikes the ideal balance between launch excitement, safety, and versatility. The extra five feet of length over the 25-foot model translates to noticeably higher launches and a more dramatic experience.

Ideal for: Summer camps serving 100 to 300 campers per session, church camps, scout camps, and mid-sized resort waterfronts. The 30-foot Blob accommodates a wide range of ages and sizes comfortably and delivers the classic blob experience that campers remember for years.

Water depth requirement: A minimum of 10 feet at the launch end. The 30-foot model generates enough launch height to thrill teenagers and adults while remaining manageable for younger participants with proper supervision. It is the sweet spot of the Water Blob® lineup.

The 35-Foot Water Blob®: Stepping Up the Excitement

The 35-foot Water Blob® is designed for larger programs that want to offer a premium blob experience. The additional length creates a longer air chamber, which translates to more powerful launches and higher flights. This model is a favorite among camps with robust waterfront programs and a high volume of participants.

Ideal for: Large summer camps serving 300 or more campers, multi-activity waterfront facilities, adventure resorts, and programs that feature the blob as a flagship attraction. The 35-foot model is also preferred by camps that host teen and adult retreats where participants want maximum launch height.

Water depth requirement: A minimum of 12 feet at the launch end is recommended. Camps choosing the 35-foot model should ensure they have adequate lifeguard staffing and a well-organized rotation system, as the higher launches attract large crowds and create significant demand for turns.

The 40-Foot Water Blob®: The Ultimate Experience

The 40-foot Water Blob® is the flagship of the lineup—the largest and most spectacular model we manufacture. It delivers the most dramatic launches, the highest flights, and the most unforgettable experience of any blob on the market. This is the model that generates the viral videos and the lifelong memories.

Ideal for: The largest summer camps, commercial waterparks, adventure tourism operators, and major resort properties. The 40-foot Blob is a statement piece—the centerpiece of any waterfront and the activity that guests and campers talk about for years.

Water depth requirement: A minimum of 14 feet at the launch end. Operating the 40-foot model requires robust safety protocols, experienced lifeguard teams, and ample waterfront space. For facilities with the infrastructure to support it, the 40-foot Blob delivers an unmatched experience that sets your program apart from every competitor.

Key Factors to Consider

Beyond the physical dimensions, there are several factors you should weigh when selecting your Water Blob® size. First, consider the age range of your primary participants. Younger campers (ages 8 to 12) do very well on the 25-foot and 30-foot models, while teens and adults prefer the power of the 35-foot and 40-foot versions.

Second, evaluate your waterfront infrastructure. Measure the actual water depth at the proposed blob location—not the average depth of the lake, but the specific depth where the launch end of the blob will sit. Also ensure you have adequate anchoring points and enough open water for safe splash zones.

Third, think about throughput. Larger blobs can accommodate more participants per hour because the longer air chamber allows for slightly faster cycling between launches. If you serve a large camp population and waterfront time is limited, a larger blob may help more campers enjoy the activity during each session.

Finally, consider your budget and long-term plans. Every Water Blob® we manufacture is built with the same commercial-grade materials and construction quality. The difference in price between sizes is modest relative to the total investment, and upgrading later means purchasing a second unit. Many camp directors tell us they wish they had gone one size larger from the start.

Quick Comparison at a Glance

Here is a summary to help guide your decision. The 25-foot model is best for small facilities and younger campers, requiring 8 feet of water depth. The 30-foot model is the all-around favorite for mid-sized camps, requiring 10 feet. The 35-foot model is ideal for large camps wanting premium launches, requiring 12 feet. And the 40-foot model is the ultimate experience for the largest programs, requiring 14 feet.

No matter which size you choose, every Water Blob® is manufactured in the USA with heavy-duty vinyl, reinforced seams, and commercial-grade valves. We stand behind our product with industry-leading durability and customer support. If you are still unsure which size is right for your program, our team is always happy to walk you through the decision based on your specific waterfront conditions and goals.