# Session lengths and flexible start times > Let customers choose how long they stay - 45 or 75 minutes, say - with starts that overlap and share one set of spaces. Who can do this: admins only. Give a session more than one length, such as 45 and 75 minutes, and customers choose how long they stay when they book. Start times can overlap - a start every 30 minutes on a 60-minute session - and every start shares the session's spaces, so the sauna is never booked past its capacity. Session lengths are being turned on venue by venue. If you don't see **Prices & lengths** on a session, get in touch and we'll switch it on for you. ## How spaces are shared Every start of the session draws on one number: the session's **Spaces**. A booking holds a space from its start time until its length runs out, so a 75-minute booking from 09:00 is still in the room at 10:00. A start has room when one more person fits for its whole length. So on a 10-space session, six 75-minute bookings at 09:00 leave four spaces at 10:00 until 10:15. ## Add lengths and prices Open a session on the [Sessions page](/go/admin/sessions) and go to **Prices & offers**. Under **Prices & lengths**, select **Add length**, enter the minutes and select **Add**. A session can have up to 4 lengths, from 15 minutes to 4 hours in 5-minute steps. Enter a price for each ticket type at each length. A price with no amount yet is outlined until you fill it in. To pick which length customers see first, open the length's menu and select **Make default**. **Change length** and **Remove** are in the same menu. **Add price** sets a price's amount at every length at once. Leave a price empty at a length it isn't offered at - no 30-minute private hire, say. Empty reads **Off**. ## Add start times Add times on the [repeat schedule](/docs/repeat-schedules) or as [one-off dates](/docs/one-off-schedules) as usual. **Times by example.** Type a time after the day's last start and the editor reads the pattern - "Looks like a new start every 30 min. Keep going?" Select **Fill in** and set the **Last start**. Or select **Add a range** and set **Every** and **Last start**. One-off dates work the same way. Starts at a steady step show as one chip, like "09:00 → 12:00 every 30m · until 13:15". Select it to change or remove them. **Closes at.** With two or more lengths, set **Closes at** on a range of times and no booking runs past it: starts at 17:00, 18:00 and 19:00 closing at 20:00 offer 120 minutes until 18:00, then 60 minutes only. It starts at the last start plus the longest length, which cuts nothing. If a start's bookings run into the next, the schedule notes that they share spaces. ## What customers see - **Booking page:** starts that overlap show as one item - the time from the first start to the last finish, the lengths, and a button for each start time. A full start still opens, so customers can join its [waiting list](/docs/waiting-lists). A start that overlaps nothing looks like any other session, with its lengths in place of an end time ("15:00 · 45 or 75 min"). - **Session page:** customers pick a length, then a price at that length. Start times without room for their group are greyed. - **Emails** show the booking's own times, such as 09:00 - 10:15. ## See who's booked On **Sessions**, a day's overlapping starts are one block, such as "09:00 - 12:00, every 30 min". In **Bookings**, they're one row; select it to see its bookings grouped by start, each with its own length. ## Cancel a day's starts To cancel one start, open it from the calendar and use **Cancel session**, as for any [cancelled session](/docs/manage-bookings-admins). To cancel the whole day, choose **Every start on this day** in the same dialog. Their bookings are cancelled and refunded as usual. ## Common questions 1. **What happens on the waiting list when someone cancels?** Their space frees time on every start it overlapped, so each of those starts offers the space to its waiting list. 2. **Can I set a different price for one date?** Not on a session with lengths. Prices are set once per length, for every start. 3. **How is this different from shorter sessions?** Lengths let a booking start at any start time; [shorter sessions](/docs/part-session) only split one session into halves. 4. **Do member rates follow the length?** Yes - a percentage comes off that length's price, and a fixed member price never exceeds it. Each booking uses one free session. 5. **Can I remove a length people have booked?** No. Saving is blocked while future bookings hold that length - move or cancel them first. 6. **Can a booking move to another time?** Yes. It keeps its length and price, and only times with room for that length are offered. To change length, cancel and rebook. ## Troubleshooting 1. **A start shows as full but it isn't busy.** Bookings from an earlier start may still be in the room. Open that start to see who's booked. 2. **The price at checkout isn't what I expected.** Check the ticket type's price at the length the customer chose under **Prices & lengths**. A length with no price set yet can't be sold.