It all depends on where you buy your clothing from. Plus sized clothing can be more expensive since it takes more material to create the clothing. A great place to look for plus sized board shorts is on Woman Within or maybe just checkout the men's department.
Walmart has plus siz board shorts. They have an extensive section in the summer that includes swimsuits and coverups and board short. While I wouldn't buy a plus sized swimsuit there I would buy the board shorts to cover up in.
You can always go online and type in plus size board shorts and the website will list all the website that relate to plus size and board shorts. You can also visit the web page of plus size store like Lane Bryant, Macy's might have some, even Walmart might have them.
JCpenney.com has nice plus size board shorts available. Landsend.com is another good website that offers good plus size board shorts.
Finding a pair of board shorts for plus size figures is simple online if you search at nextag.com. The prices there are something you will be satisfied with.
Walmart has Danskin Now running shorts for $8 on their website: http://www.walmart.com/ip/Danskin-Now-Women-s-Plus-Woven-Running-Shorts/17753642 A website that specializes in plus sized activewear is http://www.junonia.com/ and they have a lot of running shorts available.
If you go to www.boardshortsworld.com you will find board shorts in plus sizes and in many styles and colors. BoardShortsWorld is your number one place to go for fast delivery of your purchase.
The website swimsuitsforall.com carries plus size swimsuits as well as accessories and board shorts. Sites like Amazon will probably have quite a few listings as well dependent upon the season.
There are many places to find womens plus size board shorts. Retail stores that sell these include JCPenney and Old Navy. Many websites, including Amazon.com and swimoutlet.com, also carry these.
You can buy womans plus size running shorts online at http://www.athleta.com/products/plus-size-running-shorts.jsp They have a good range at good prices.
You can find plus size board shorts at either of these two stores. JCpenny and Target both have a wide selection of designs as well. Target seems to a wider variety when comparing the two but JC Penny's sizes seems to go higher.
Several stores carry plus size boy shorts panties: Amazon, Hips and Curves, Hanes and Freshpair. Check these website regularly for special sales and discounts.
There are many brands of plus sized athletic Shorts. Old Navy has a wonderful selection of Plus Sized and Normal Sized Work out shorts. No two women are the same, and they knew that when they designed their work out collections!