The length of the hose should be carefully considered prior to purchase. For attack hose, the most common options are 50 and 100 feet. Two 50' lengths will always cost a bit more, as there is an extra set of couplings required when compared to a single 100' length. Proponents of 100' lengths often cite cost effectiveness as well as the absence of an additional coupling, which can cause a snag problem when going around corners.

I advocate for 50' lengths, however, as they are easier to roll and store, and they allow for more flexibility when breaking or extending hose lines during stretches. Though not as common, 75' lengths are available, and I have commonly found these used in high-rise bundles, where two lengths create a single 150' hose load.
Supply hose is a different story. When using 3" hose, it's typical to see 50' lengths, as this line is also regularly used with leader lines. Having 50' lengths makes stretching, breaking and operating the lines easier for the members tasked to perform it. Larger diameter supply line (3.5–5 inches) is often best specified in 100' lengths, as the absence of the extra couplings can provide a notable increase in total hose carrying capacity in a hosebed. The best way to address breaking these longer 100' lengths when they are too long is to have at least one 50' and one 25' "pony" section of the supply hose. Ideally, carrying two of each offers greater flexibility, especially when your engine companies are connecting to four-way valves or connecting multiple supply lines to the rig.