When you select Pack Size, make sure you also look at the photo that is displayed This is what you need to see if you have selected the correct one.
Item specifics:
Canon 540, 541,  540XL, 541XL, Ink Cartridges, PG540, CL-541, PG540L, CL-541XL
These New Sealed Ink Cartridges, Fast Delivery From UK, No Risk Money Back 100% Guarantee.
Model: 540, 541 540l, 541xl
Brand: Canon
Technology: Ink Jet Printer Cartridges
Product Type: Genuine/Original
Condition: Brand New
Warranty 1 Year

Item Drop down Menu Details:
Please select correct Ink Cartridges and Qty  Available in Variations:
1X Black Canon PG-540L, High Capacity
2X Black Canon PG-540L, High Capacity
1X Colour Canon CL-541XL, High Capacity
2X Colour Canon CL-541XL, High Capacity
1X BK PG-540XL + 1X Colour CL-541XL, High Capacity
2X BK PG-540XL + 1X Colour CL-541XL, High Capacity
1X PG-540XL + 1X CL-541XL Paper Pack, High Capacity

Item description:

USE With

Pixma
These Canon Pixma Printers work the 540L+ 541 ink cartridge:
Canon Pixma MG2150 ink cartridges
Canon Pixma MG2250 ink cartridges
Canon Pixma MG2255 ink cartridges
Canon Pixma MG3100 ink cartridges
Canon Pixma MG3150 ink cartridges
Canon Pixma MG3155 ink cartridges
Canon Pixma MG3200 ink cartridges
Canon Pixma MG3250 ink cartridges
Canon Pixma MG3350 ink cartridges
Canon Pixma MG3500 ink cartridges
Canon Pixma MG3550 ink cartridges
Canon Pixma MG3600 ink cartridges
Canon Pixma MG3650 ink cartridges
Canon Pixma MG3650S ink cartridges
Canon Pixma MG4150 ink cartridges
Canon Pixma MG4200 ink cartridges
Canon Pixma MG4250 ink cartridges
Canon Pixma MX375 ink cartridges
Canon Pixma MX390 ink cartridges
Canon Pixma MX394 ink cartridges
Canon Pixma MX395 ink cartridges
Canon Pixma MX435 ink cartridges
Canon Pixma MX455 ink cartridges
Canon Pixma MX475 ink cartridges
Canon Pixma MX515 ink cartridges
Canon Pixma MX525 ink cartridges
Canon Pixma MX530 ink cartridges
Canon Pixma MX535 ink cartridges
Canon Pixma TS5100 ink cartridges
Canon Pixma TS5150 ink cartridges
Canon Pixma TS5151 ink cartridges