For this we recommend a sample size no smaller than 150.
This article covers:
Total Audience Size
You can quickly see the total audience size for your audience at the bottom of the page whilst in Audience Builder.
The count will update as you add, remove or update attributes.
Simply hover over one of the boxes to see the audience size for a specific quarter.
If the box is red, this means the question/data point was not included in this wave, and therefore no audience exists.
Sample Size (with filters applied)
The sample size is your audience for the specific markets and research waves you are looking to query.
You should always check your sample size before running any further queries with these filters applied.
To find your sample size:
Step Two: Open the filters menu on the right
Once you have done this, the responses figure will provide you with your sample size