What's the ideal length of a standup?

[zoltanersek _outpostlabs_dev_]

I was part of many teams over the length of my career, and I keep finding 2 extremes when it comes to standups: they either last under 10 minutes or they go on for almost an hours. It's no surprise to anyone, that I prefer the first. 

Now, what do you think an ideal standup should take? 
What is your advice for optimizing long standups? Especially, what I can do as a relatively new member of the team. 

We don't have a scrum master or someone 100% focused on agile practices. 

[Amanda Barber]

We keep ours pretty focused and then have a post-standup for further conversation. I think it helps that I have a hard cutoff at the end of our meeting so it has to end, haha! At a prior company, we actually pivoted to required daily standups in Slack kept to the 3 basic standup questions and then our daily calls were brief times to connect on a more personal level. 

When using Jira, there's a timer option in the standup view if you want to try to keep people on time!