When working on a project like customizing a lava lamp with resin 3D printed Pokemon figures, sizing is crucial. I faced a similar dilemma where I initially picked a 52 oz lava lamp, but soon realized the scale of my Pokemon models might crowd the lamp’s interior. This made me reconsider whether to proceed with the original size or opt for a larger lamp to maintain the right aesthetics and space. One important factor is the size and number of figures you want to display. Larger figures need more room to move or be positioned without blocking the lava’s natural flow or the lamp’s lighting effect. If the lamp is too small, not only will it feel cramped, but the visual balance could be lost, making the project less appealing. Another aspect to consider is the lamp's liquid and lava dynamics—colors like green lava with blue liquid can create a retro ambiance that enhances the overall look. Make sure any modifications do not compromise these effects. Additionally, when 3D printing with resin, overusing supports can lead to more cleanup and can affect the surface quality of the figures. In my experience, carefully planning the supports and sometimes resizing models slightly helps achieve cleaner results. Ultimately, sizing up the lava lamp slightly can provide more flexibility for your figures and outweigh the cost or space considerations. It’s better to have some extra room than to feel restricted mid-project. I recommend measuring your models carefully, mock placing them in the lamp space if possible, and then deciding based on the balance of scale, aesthetics, and the lamp’s functionality.