How can you tell from information on the box or manual what the size of the finished set will be? I'm thinking of space needed to create and store, etc.
Modern largest sets usually state on the box how big they are. But this isn't a case for smaller sets.
However there is another option. Based on brick dimensions it is possible to estimate the size of a set. Assuming set is built in traditional "studs up" approach:
- each stud on horizontal plane would be 8mm
- each brick on vertical plane would be 9.6mm, where each plate is 3.2mm.
LEGO shop site
In the marketing for large LEGO sets, they typically make a big deal about advertising the dimensions. In the case of the Apollo Saturn V for example you can find the dimensions under the 'Specifications' section:
Measures over 39" (100cm) high and 6” (17cm) in diameter.
You might also be able to find this on the set box.
Bricklink Studio also has a feature that displays the dimensions and weight of models. This can be found under the menu bar 'Model' and then 'Model Info'.
If you can find an existing model of the set you are looking for you can download it and import it into the software. Of course you can also make modifications to the model or build your own too.
You can import LEGO Digital Designer files into Studio as well and there is a huge collection of fan-made models of existing sets at Eurobricks.