Hi @Dextrix HD
It's usually 7 days but I just checked Jira Cloud Standard by itself just now and it suggests it's 1 month long - so it depends which bundle you try. The features you get to try are:
^ Just remember you'll begin paying based on your user tier after the free trial ends.
You can find the trial options via this link here
You can also find a pricing calculator via this link for user tier costs - notably, there is a free version if you're a small team, just remember to compare what options are available on this version as the features are reduced.