This tutorial covers wet blocking of smaller cross stitch pieces. For blocking larger finishes with more distortion, you may want to refer to my previous tutorial from the Simple Harmony series on blocking: https://www.youtube.com/watch?v=NdvdEkuXSls&t=843s
To wet block, you will need a blocking board, stainless steel pins, a small spray bottle filled with cold water (I use a travel size bottle purchased from CVS), and a color stable finish.
Always use cold water when blocking - warm or hot water could set the color if any dye does run
You can find knitter's blocking boards on Amazon in a variety of styles, search knitter's blocking board. This is what I purchased, but a set with a thicker or darker grid would have been preferable: https://www.amazon.com/Boye-Interlocking-Needlepoint-Knitting-Blocking/dp/B07K7CSWRS/ref=sr_1_5_pp?crid=QRRI7BHQ5EXH&dib=eyJ2IjoiMSJ9.0ceouzbvV3YHKP3Z3HCCjsJaJQKq8X2zalWSQp1DzT60vGPQR_YT5uwPmTE6Ldpx3jPRAX6H6hGxAYKn_Ozp62pt5Tm8Ieo82B9zdl3Cq_e2KdfoQ1kTskXJhXdLuFIyuiHfX2PlSJylTt6Jaw25N18D6lH5KLWZeN-MkS08z3XUQQRNTTFu2rCHge6fUofU5RWnhHTY3hTEM6UnyDxM4593WeK_-M2ZlZSfu4j8LhAw0WRBhM2moJL0XJkd7bRcY8pohhAQm74ctnZmBMsDhCZwfiLwyKK0cGcCYHOlDak.gc4tCzRV2jaZZMV4opdHfxZZXHZyKyrWreWgeE0Y17k&dib_tag=se&keywords=blocking+boards+for+knitting&qid=1728527589&sprefix=blocking+b%2Caps%2C162&sr=8-5
My pins were purchased from Needle in a Haystack, scroll down the page to the pins section: http://www.needlestack.com/WebStore/Accessories/Accessories.html
My conversion for Stacy Nash's Jack's House pinkeep was in episode 81: https://youtu.be/5zNzc_peXo8
Brenda Gervais' Peppermint Pals was in episode 10: https://www.youtube.com/watch?v=0_eQpewZrzE