By Authentique, this package is the Complete Calendar Designer Paper Collection #CAL065.   Note:  This is the coveted 2019 release of the calendar collection that includes the plaid (not gigham) patterned paper.
 
This product contains 48 double-sided 12x12 sheets - one each of the following for each of the 12 calendar months:
pattern 
sentiments
images
solids
 
Options sold separately:   By Authentique, package of 13 blank calendar sheets to create your own calendar.
100 lb. paper weight - strong enough for wall calendars 
Room for decorating with the month, edges and everything in between.