What is the size of this item when boxed? I need 12" ID x 25ft

The dimensions of the "Air Ventilator Orange" Ventilation Duct Hose, 12"ID x 25 when boxed are 14x14x14.

Can I use this duct for suction of air? My concern is if it collapse under negative pressure.

Rubber-Cal Air Ventilator can be used for many applications; however, it would be best to use a negative pressure hose to avoid any collapsing. We often recommend the Rubber-Cal "Thermoplastic Flex Medium Duty WS", which has become one the most popular universal ducting hose within the brand. It has been know to handle many applications with ease and earns many raving reviews. Please view the link below for the "Thermoplastic Flex Medium Duty WS". https://www.amazon.com/Rubber-Cal-Thermoplastic-Flex-Medium-Duty-Hose/dp/B006YIVNPI/ref=pd_day0_60_1?_encoding=UTF8&psc=1&refRID=99F9HJ3307CNVYMTAVWY For any further question, please contact our ducting experts at, 1-800-370-9152 for assistance.

Can this hose be cut to length or will the cut end be a mess?

We don't recommend cutting this hose as the end result is fairly messy and tends to not function properly. That is why we don't offer any custom cutting on this specific type of ducting.