Can you see it...the spider?
Here...let me bother it for you (Steve Irwin Style)
This opening is a full inch diameter which is pretty big because they tuck their legs under and over them as they go in meaning the hole is the exact size if their body. The hole is between 4 and 5 inches deep with a small underground cavaty at the bottom. The hole is a work of art is it not, smoothed out and fully lined with silken web.
Ive seen Aboriginal people tease them into biting a blade of grass so they can be gently pulled from their hole. (Not sure why)