Hi all! Trying to prepare for our new pool, arriving tomorrow. Thanks to this site, I have most of the measurements and things mapped out RE where to put the 4x8x16 pavers/blocks EXCEPT for one detail: how wide are these things? Will they extend beyond the 16'' width of the paver (I'm laying them out long-ways around the pool)? If so, will that present a problem? Thanks so much for any info you can share!